---
_id: '2725'
abstract:
- lang: eng
text: We prove that the two dimensional free magnetic Schrödinger operator, with
a fixed constant magnetic field and Dirichlet boundary conditions on a planar
domain with a given area, attains its smallest possible eigenvalue if the domain
is a disk. We also give some rough bounds on the lowest magnetic eigenvalue of
the disk.
author:
- first_name: László
full_name: László Erdös
id: 4DBD5372-F248-11E8-B48F-1D18A9856A87
last_name: Erdös
orcid: 0000-0001-5366-9603
citation:
ama: Erdös L. Rayleigh-type isoperimetric inequality with a homogeneous magnetic
field. Calculus of Variations and Partial Differential Equations. 1996;4(3):283-292.
doi:10.1007/BF01254348
apa: Erdös, L. (1996). Rayleigh-type isoperimetric inequality with a homogeneous
magnetic field. Calculus of Variations and Partial Differential Equations.
Springer. https://doi.org/10.1007/BF01254348
chicago: Erdös, László. “Rayleigh-Type Isoperimetric Inequality with a Homogeneous
Magnetic Field.” Calculus of Variations and Partial Differential Equations.
Springer, 1996. https://doi.org/10.1007/BF01254348.
ieee: L. Erdös, “Rayleigh-type isoperimetric inequality with a homogeneous magnetic
field,” Calculus of Variations and Partial Differential Equations, vol.
4, no. 3. Springer, pp. 283–292, 1996.
ista: Erdös L. 1996. Rayleigh-type isoperimetric inequality with a homogeneous magnetic
field. Calculus of Variations and Partial Differential Equations. 4(3), 283–292.
mla: Erdös, László. “Rayleigh-Type Isoperimetric Inequality with a Homogeneous Magnetic
Field.” Calculus of Variations and Partial Differential Equations, vol.
4, no. 3, Springer, 1996, pp. 283–92, doi:10.1007/BF01254348.
short: L. Erdös, Calculus of Variations and Partial Differential Equations 4 (1996)
283–292.
date_created: 2018-12-11T11:59:16Z
date_published: 1996-04-01T00:00:00Z
date_updated: 2021-01-12T06:59:17Z
day: '01'
doi: 10.1007/BF01254348
extern: 1
intvolume: ' 4'
issue: '3'
month: '04'
page: 283 - 292
publication: Calculus of Variations and Partial Differential Equations
publication_status: published
publisher: Springer
publist_id: '4167'
quality_controlled: 0
status: public
title: Rayleigh-type isoperimetric inequality with a homogeneous magnetic field
type: journal_article
volume: 4
year: '1996'
...
---
_id: '2726'
abstract:
- lang: eng
text: We investigate whether the eigenfunctions of the two-dimensional magnetic
Schrödinger operator have a Gaussian decay of type exp(-Cx2) at infinity (the
magnetic field is rotationally symmetric). We establish this decay if the energy
(E) of the eigenfunction is below the bottom of the essential spectrum (B), and
if the angular Fourier components of the external potential decay exponentially
(real analyticity in the angle variable). We also demonstrate that almost the
same decay is necessary. The behavior of C in the strong field limit and in the
small (B - E) limit is also studied.
acknowledgement: Partial support from the Hungarian National Foundation for Scientific
Research, grant no. 1902.
article_processing_charge: No
article_type: original
author:
- first_name: László
full_name: Erdös, László
id: 4DBD5372-F248-11E8-B48F-1D18A9856A87
last_name: Erdös
orcid: 0000-0001-5366-9603
citation:
ama: Erdös L. Gaussian decay of the magnetic eigenfunctions. Geometric and Functional
Analysis. 1996;6(2):231-248. doi:10.1007/BF02247886
apa: Erdös, L. (1996). Gaussian decay of the magnetic eigenfunctions. Geometric
and Functional Analysis. Birkhäuser. https://doi.org/10.1007/BF02247886
chicago: Erdös, László. “Gaussian Decay of the Magnetic Eigenfunctions.” Geometric
and Functional Analysis. Birkhäuser, 1996. https://doi.org/10.1007/BF02247886.
ieee: L. Erdös, “Gaussian decay of the magnetic eigenfunctions,” Geometric and
Functional Analysis, vol. 6, no. 2. Birkhäuser, pp. 231–248, 1996.
ista: Erdös L. 1996. Gaussian decay of the magnetic eigenfunctions. Geometric and
Functional Analysis. 6(2), 231–248.
mla: Erdös, László. “Gaussian Decay of the Magnetic Eigenfunctions.” Geometric
and Functional Analysis, vol. 6, no. 2, Birkhäuser, 1996, pp. 231–48, doi:10.1007/BF02247886.
short: L. Erdös, Geometric and Functional Analysis 6 (1996) 231–248.
date_created: 2018-12-11T11:59:17Z
date_published: 1996-03-01T00:00:00Z
date_updated: 2022-08-11T10:05:58Z
day: '01'
doi: 10.1007/BF02247886
extern: '1'
intvolume: ' 6'
issue: '2'
language:
- iso: eng
month: '03'
oa_version: None
page: 231 - 248
publication: Geometric and Functional Analysis
publication_identifier:
issn:
- 1016-443X
publication_status: published
publisher: Birkhäuser
publist_id: '4166'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Gaussian decay of the magnetic eigenfunctions
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 6
year: '1996'
...
---
_id: '11761'
abstract:
- lang: eng
text: We prove that in an undirected graph there are at most O(n²) cuts of size
strictly less than of the size of the minimum cut.
article_processing_charge: No
article_type: original
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: David P.
full_name: Williamson, David P.
last_name: Williamson
citation:
ama: Henzinger MH, Williamson DP. On the number of small cuts in a graph. Information
Processing Letters. 1996;59(1):41-44. doi:10.1016/0020-0190(96)00079-8
apa: Henzinger, M. H., & Williamson, D. P. (1996). On the number of small cuts
in a graph. Information Processing Letters. Elsevier. https://doi.org/10.1016/0020-0190(96)00079-8
chicago: Henzinger, Monika H, and David P. Williamson. “On the Number of Small Cuts
in a Graph.” Information Processing Letters. Elsevier, 1996. https://doi.org/10.1016/0020-0190(96)00079-8.
ieee: M. H. Henzinger and D. P. Williamson, “On the number of small cuts in a graph,”
Information Processing Letters, vol. 59, no. 1. Elsevier, pp. 41–44, 1996.
ista: Henzinger MH, Williamson DP. 1996. On the number of small cuts in a graph.
Information Processing Letters. 59(1), 41–44.
mla: Henzinger, Monika H., and David P. Williamson. “On the Number of Small Cuts
in a Graph.” Information Processing Letters, vol. 59, no. 1, Elsevier,
1996, pp. 41–44, doi:10.1016/0020-0190(96)00079-8.
short: M.H. Henzinger, D.P. Williamson, Information Processing Letters 59 (1996)
41–44.
date_created: 2022-08-08T11:49:48Z
date_published: 1996-07-08T00:00:00Z
date_updated: 2022-09-12T09:39:51Z
day: '08'
doi: 10.1016/0020-0190(96)00079-8
extern: '1'
intvolume: ' 59'
issue: '1'
language:
- iso: eng
month: '07'
oa_version: None
page: 41-44
publication: Information Processing Letters
publication_identifier:
issn:
- 0020-0190
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: On the number of small cuts in a graph
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 59
year: '1996'
...
---
_id: '11804'
abstract:
- lang: eng
text: "This paper shows how a general technique, called lock-step search, used in
dynamic graph algorithms, can be used to improve the running time of two problems
arising in program verification and communication protocol design.\r\n(1)We consider
the nonemptiness problem for Streett automata: We are given a directed graph G
= (V, E) with n = ¦V¦ and m = ¦E¦, and a collection of pairs of subsets of vertices,
called Streett pairs,〈L i , U i 〉, i = 1.k. The question is whether G has a cycle
(not necessarily simple) which, for each 1 ≤ i ≤ k, if it contains a vertex from
L i then it also contains a vertex of U i . Let b=Σ i=1..k |L i |+|U i |. The
previously best algorithm takes time O((m + b) min{n, k}). We present an algorithm
that takes time \U0001D442(\U0001D45Amin{\U0001D45A\U0001D459\U0001D45C\U0001D454\U0001D45B,‾‾‾‾‾‾√\U0001D458,\U0001D45B}+\U0001D44F\U0001D45A\U0001D456\U0001D45B{\U0001D459\U0001D45C\U0001D454\U0001D45B,\U0001D458}).\r\n(2)In
communication protocol pruning we are given a directed graph G = (V, E) with l
special vertices. The problem is to efficiently maintain the strongly-connected
components of the special vertices on a restricted set of edge deletions. Let
m i be the number of edges in the strongly connected component of the ith special
vertex. The previously best algorithm repeatedly recomputes the strongly-connected
components which leads to a running time of O(Σ i m 2i). We present an algorithm
with time \U0001D442(\U0001D459√∑\U0001D456\U0001D45A1.5\U0001D456)."
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Jan Arne
full_name: Telle, Jan Arne
last_name: Telle
citation:
ama: 'Henzinger MH, Telle JA. Faster algorithms for the nonemptiness of streett
automata and for communication protocol pruning. In: 5th Scandinavian Workshop
on Algorithm Theory. Vol 1097. Springer Nature; 1996:16–27. doi:10.1007/3-540-61422-2_117'
apa: 'Henzinger, M. H., & Telle, J. A. (1996). Faster algorithms for the nonemptiness
of streett automata and for communication protocol pruning. In 5th Scandinavian
Workshop on Algorithm Theory (Vol. 1097, pp. 16–27). Reykjavik, Iceland: Springer
Nature. https://doi.org/10.1007/3-540-61422-2_117'
chicago: Henzinger, Monika H, and Jan Arne Telle. “Faster Algorithms for the Nonemptiness
of Streett Automata and for Communication Protocol Pruning.” In 5th Scandinavian
Workshop on Algorithm Theory, 1097:16–27. Springer Nature, 1996. https://doi.org/10.1007/3-540-61422-2_117.
ieee: M. H. Henzinger and J. A. Telle, “Faster algorithms for the nonemptiness of
streett automata and for communication protocol pruning,” in 5th Scandinavian
Workshop on Algorithm Theory, Reykjavik, Iceland, 1996, vol. 1097, pp. 16–27.
ista: 'Henzinger MH, Telle JA. 1996. Faster algorithms for the nonemptiness of streett
automata and for communication protocol pruning. 5th Scandinavian Workshop on
Algorithm Theory. SWAT: Scandinavian Workshop on Algorithm Theory, LNCS, vol.
1097, 16–27.'
mla: Henzinger, Monika H., and Jan Arne Telle. “Faster Algorithms for the Nonemptiness
of Streett Automata and for Communication Protocol Pruning.” 5th Scandinavian
Workshop on Algorithm Theory, vol. 1097, Springer Nature, 1996, pp. 16–27,
doi:10.1007/3-540-61422-2_117.
short: M.H. Henzinger, J.A. Telle, in:, 5th Scandinavian Workshop on Algorithm Theory,
Springer Nature, 1996, pp. 16–27.
conference:
end_date: 1996-07-05
location: Reykjavik, Iceland
name: 'SWAT: Scandinavian Workshop on Algorithm Theory'
start_date: 1996-07-03
date_created: 2022-08-11T13:42:42Z
date_published: 1996-07-01T00:00:00Z
date_updated: 2023-02-14T07:52:17Z
day: '01'
doi: 10.1007/3-540-61422-2_117
extern: '1'
intvolume: ' 1097'
language:
- iso: eng
month: '07'
oa_version: None
page: 16–27
publication: 5th Scandinavian Workshop on Algorithm Theory
publication_identifier:
eisbn:
- '9783540685296'
eissn:
- 1611-3349
isbn:
- '9783540614227'
issn:
- 0302-9743
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Faster algorithms for the nonemptiness of streett automata and for communication
protocol pruning
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1097
year: '1996'
...
---
_id: '11910'
abstract:
- lang: eng
text: "We state a new sampling lemma and use it to improve the running time of dynamic
graph algorithms.\r\n\r\nFor the dynamic connectivity problem the previously best
randomized algorithm takes expected time O(log3 n) per update, amortized over
Ω(m) updates. Using the new sampling lemma, we improve its running time to O(log2
n). There exists a lower bound in the cell probe model for the time per operation
of Ω(log n/ log log n) for this problem.\r\n\r\nSimilarly improved running times
are achieved for 2-edge connectivity, k-weight minimum spanning tree, and bipartiteness."
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Mikkel
full_name: Thorup, Mikkel
last_name: Thorup
citation:
ama: 'Henzinger MH, Thorup M. Improved sampling with applications to dynamic graph
algorithms. In: 23rd International Colloquium on Automata, Languages, and Programming.
Vol 1099. Springer Nature; 1996:290-299. doi:10.1007/3-540-61440-0_136'
apa: 'Henzinger, M. H., & Thorup, M. (1996). Improved sampling with applications
to dynamic graph algorithms. In 23rd International Colloquium on Automata,
Languages, and Programming (Vol. 1099, pp. 290–299). Paderborn, Germany: Springer
Nature. https://doi.org/10.1007/3-540-61440-0_136'
chicago: Henzinger, Monika H, and Mikkel Thorup. “Improved Sampling with Applications
to Dynamic Graph Algorithms.” In 23rd International Colloquium on Automata,
Languages, and Programming, 1099:290–99. Springer Nature, 1996. https://doi.org/10.1007/3-540-61440-0_136.
ieee: M. H. Henzinger and M. Thorup, “Improved sampling with applications to dynamic
graph algorithms,” in 23rd International Colloquium on Automata, Languages,
and Programming, Paderborn, Germany, 1996, vol. 1099, pp. 290–299.
ista: 'Henzinger MH, Thorup M. 1996. Improved sampling with applications to dynamic
graph algorithms. 23rd International Colloquium on Automata, Languages, and Programming.
ICALP: International Colloquium on Automata, Languages, and Programming, LNCS,
vol. 1099, 290–299.'
mla: Henzinger, Monika H., and Mikkel Thorup. “Improved Sampling with Applications
to Dynamic Graph Algorithms.” 23rd International Colloquium on Automata, Languages,
and Programming, vol. 1099, Springer Nature, 1996, pp. 290–99, doi:10.1007/3-540-61440-0_136.
short: M.H. Henzinger, M. Thorup, in:, 23rd International Colloquium on Automata,
Languages, and Programming, Springer Nature, 1996, pp. 290–299.
conference:
end_date: 1996-07-12
location: Paderborn, Germany
name: 'ICALP: International Colloquium on Automata, Languages, and Programming'
start_date: 1996-07-08
date_created: 2022-08-18T06:42:24Z
date_published: 1996-07-01T00:00:00Z
date_updated: 2023-02-14T07:57:14Z
day: '01'
doi: 10.1007/3-540-61440-0_136
extern: '1'
intvolume: ' 1099'
language:
- iso: eng
month: '07'
oa_version: None
page: 290-299
publication: 23rd International Colloquium on Automata, Languages, and Programming
publication_identifier:
eisbn:
- '9783540685807'
eissn:
- 1611-3349
isbn:
- '9783540614401'
issn:
- 0302-9743
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Improved sampling with applications to dynamic graph algorithms
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1099
year: '1996'
...
---
_id: '11927'
abstract:
- lang: eng
text: "We are given a set 7 = {Tl , Tz, . . . , Tk} of rooted binary trees, each
Ti leaf-labeled by a subset L(x) c {1,2 )...) n}. IfT is a tree on {1,2, . . ,
n}, we let T]L denote the subtree of T induced by the nodes of L and all their
ancestors. The consensus tree problem asks whether there exists a tree T* such
that for every I, T’ IC(Ti) is homeomorphic to Ti. We present algorithms which
test if a given set of trees has a consensus tree and if so, construct one. The
deterministic algorithm takes time min{O(mn’/‘), O(m + n2 logn)}, where m = Ci
IZl and uses linear space. The randomized algorithm takes\r\ntime O(m log3 n)
and uses linear space. The previous best for this problem was an 1981 O(mn) algorithm
by Aho et al. Our faster deterministic algorithm uses a new efficient algorithm
for the following interesting dynamic graph problem: Given a graph G with n nodes
and m edges and a sequence of b batches of one or more edge deletions, then after
each batch, either find a new component that has just been created or determine
that there is no such component. For this\r\nproblem, we have a simple algorithm
with running time O(n2 log n + be min{ n2, m log n}), where be is the number of
batches which do not result in a new component. For our particular application,
bc 5 1. If all edges are deleted, then the best previously known deterministic
algorithm requires time O(mJ;ii) to solve this problem. computational evolutionary
biology. The first application is in the problem of inferring consensus of trees
when there can be disagreement[l6]. There have, been several models suggested
for this problem[2, 3, 4, 8, ?, 11, 17, 181, of which one is called the Local
Consensus Tree[l5]. The local consensus tree model presumes that the user provides
a local consensus rule which determines the form of the output tree on (perhaps)
each triple of leaves, and the objective is to determine whether a tree exists
which is consistent with each of the constraints. We will show that we can construct
the local consensus tree of k trees on n species in O(kn3) time, improving on
the O(lcn3 + n”) running time if we use the Aho et al algorithm. The second application
is a\r\nheuristic for constructing the maximum likelihood tree based upon combining
solutions to small subproblems.\r\nThis is a simple and yet potentially significantly
interesting approach to the evolutionary tree construction\r\nproblem. "
article_processing_charge: No
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Valerie
full_name: King, Valerie
last_name: King
- first_name: Tandy
full_name: Warnow, Tandy
last_name: Warnow
citation:
ama: 'Henzinger MH, King V, Warnow T. Constructing a tree from homeomorphic subtrees,
with applications to computational evolutionary biology. In: 7th Annual ACM-SIAM
Symposium on Discrete Algorithms. Society for Industrial and Applied Mathematics;
1996:333-340.'
apa: 'Henzinger, M. H., King, V., & Warnow, T. (1996). Constructing a tree from
homeomorphic subtrees, with applications to computational evolutionary biology.
In 7th Annual ACM-SIAM Symposium on Discrete Algorithms (pp. 333–340).
Atlanta, GA, United States: Society for Industrial and Applied Mathematics.'
chicago: Henzinger, Monika H, Valerie King, and Tandy Warnow. “Constructing a Tree
from Homeomorphic Subtrees, with Applications to Computational Evolutionary Biology.”
In 7th Annual ACM-SIAM Symposium on Discrete Algorithms, 333–40. Society
for Industrial and Applied Mathematics, 1996.
ieee: M. H. Henzinger, V. King, and T. Warnow, “Constructing a tree from homeomorphic
subtrees, with applications to computational evolutionary biology,” in 7th
Annual ACM-SIAM Symposium on Discrete Algorithms, Atlanta, GA, United States,
1996, pp. 333–340.
ista: 'Henzinger MH, King V, Warnow T. 1996. Constructing a tree from homeomorphic
subtrees, with applications to computational evolutionary biology. 7th Annual
ACM-SIAM Symposium on Discrete Algorithms. SODA: Symposium on Discrete Algorithms,
333–340.'
mla: Henzinger, Monika H., et al. “Constructing a Tree from Homeomorphic Subtrees,
with Applications to Computational Evolutionary Biology.” 7th Annual ACM-SIAM
Symposium on Discrete Algorithms, Society for Industrial and Applied Mathematics,
1996, pp. 333–40.
short: M.H. Henzinger, V. King, T. Warnow, in:, 7th Annual ACM-SIAM Symposium on
Discrete Algorithms, Society for Industrial and Applied Mathematics, 1996, pp.
333–340.
conference:
end_date: 1996-01-30
location: Atlanta, GA, United States
name: 'SODA: Symposium on Discrete Algorithms'
start_date: 1996-01-28
date_created: 2022-08-19T06:57:47Z
date_published: 1996-01-28T00:00:00Z
date_updated: 2023-02-21T16:24:53Z
day: '28'
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://dl.acm.org/doi/10.5555/313852.314080
month: '01'
oa: 1
oa_version: Published Version
page: 333 -340
publication: 7th Annual ACM-SIAM Symposium on Discrete Algorithms
publication_identifier:
isbn:
- '0898713668'
publication_status: published
publisher: Society for Industrial and Applied Mathematics
quality_controlled: '1'
related_material:
record:
- id: '11679'
relation: later_version
status: public
scopus_import: '1'
status: public
title: Constructing a tree from homeomorphic subtrees, with applications to computational
evolutionary biology
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '1996'
...
---
_id: '1943'
abstract:
- lang: eng
text: Transhydrogenase from beef-heart mitochondria was solubilised with Triton
X-100 and purified by column chromatography. The detergent-dispersed enzyme catalysed
the reduction of acetylpyridine adenine dinucleotide (AcPdAD+) by NADH, but only
in the presence of NADP+. Experiments showed that this reaction was cyclic; NADP(H),
whilst remaining bound to the enzyme, was alternately reduced by NADH and oxidised
by AcPdAD+. A period of incubation of the enzyme with NADPH at pH 6.0 led to inhibition
of the simple transhydrogenation reaction between AcPdAD+ and NADPH. However,
after such treatment, transhydrogenase acquired the ability to catalyse the (NADPH-dependent)
reduction of AcPdAD+ by NADH. It is suggested that this is a similar cycle to
the one described above. Evidently, the binding affinity for NADP+ increases as
a consequence of the inhibition process resulting from prolonged incubation with
NADPH. The pH dependences of simple and cyclic transhydrogenation reactions are
described. Though more complex than those in Escherichia coli transhydrogenase,
they are consistent with the view [Hutton, M., Day, J.M., Bizouarn, T. and Jackson,
J.B. (1994) Eur. J. Biochem. 219, 1041–10511] that, also in the mitochondrial
enzyme, binding the release of NADP+ and NADP are accompanied by binding and release
of a proton. The enzyme was successfully reconstituted into liposomes by a cholate
dilution procedure. The proteoliposomes catalysed cyclic NADPH-dependent reduction
of AcPdAD+ by NADH only when they were tightly coupled. However, they catalysed
cyclic NADP+-dependent reduction of AcPdAD+ by NADH only when they were uncoupled
eg. by addition of carbonylcyanide-p-trifluoromethoxyphenyl hydrazone. These observations
are evidence that the proton binding and release which accompany NADP+ binding
and release, respectively, take place on the inside of the vesicle, and that they
are components of the electrogenic processes of the enzyme.
acknowledgement: 'L.A.S. is grateful to the Wellcome Trust for a Research Fellowship.
Support from the Biotechnology and Biological Sciences Research Council is also
acknowledged. We thank our colleagues. Tania Bizouarn, Mike Hutton and Nick Cotton,
for advice and valuable discussion. '
article_processing_charge: No
article_type: original
author:
- first_name: Leonid A
full_name: Sazanov, Leonid A
id: 338D39FE-F248-11E8-B48F-1D18A9856A87
last_name: Sazanov
orcid: 0000-0002-0977-7989
- first_name: Baz
full_name: Jackson, Baz
last_name: Jackson
citation:
ama: Sazanov LA, Jackson B. Cyclic reactions catalysed by detergent-dispersed and
reconstituted transhydrogenase from beef heart mitochondria; implications for
the mechanism of proton translocation. Biochimica et Biophysica Acta - Bioenergetics.
1995;1231(3):304-312. doi:10.1016/0005-2728(95)00096-2
apa: Sazanov, L. A., & Jackson, B. (1995). Cyclic reactions catalysed by detergent-dispersed
and reconstituted transhydrogenase from beef heart mitochondria; implications
for the mechanism of proton translocation. Biochimica et Biophysica Acta -
Bioenergetics. Elsevier. https://doi.org/10.1016/0005-2728(95)00096-2
chicago: Sazanov, Leonid A, and Baz Jackson. “Cyclic Reactions Catalysed by Detergent-Dispersed
and Reconstituted Transhydrogenase from Beef Heart Mitochondria; Implications
for the Mechanism of Proton Translocation.” Biochimica et Biophysica Acta -
Bioenergetics. Elsevier, 1995. https://doi.org/10.1016/0005-2728(95)00096-2.
ieee: L. A. Sazanov and B. Jackson, “Cyclic reactions catalysed by detergent-dispersed
and reconstituted transhydrogenase from beef heart mitochondria; implications
for the mechanism of proton translocation,” Biochimica et Biophysica Acta -
Bioenergetics, vol. 1231, no. 3. Elsevier, pp. 304–312, 1995.
ista: Sazanov LA, Jackson B. 1995. Cyclic reactions catalysed by detergent-dispersed
and reconstituted transhydrogenase from beef heart mitochondria; implications
for the mechanism of proton translocation. Biochimica et Biophysica Acta - Bioenergetics.
1231(3), 304–312.
mla: Sazanov, Leonid A., and Baz Jackson. “Cyclic Reactions Catalysed by Detergent-Dispersed
and Reconstituted Transhydrogenase from Beef Heart Mitochondria; Implications
for the Mechanism of Proton Translocation.” Biochimica et Biophysica Acta -
Bioenergetics, vol. 1231, no. 3, Elsevier, 1995, pp. 304–12, doi:10.1016/0005-2728(95)00096-2.
short: L.A. Sazanov, B. Jackson, Biochimica et Biophysica Acta - Bioenergetics 1231
(1995) 304–312.
date_created: 2018-12-11T11:54:50Z
date_published: 1995-10-10T00:00:00Z
date_updated: 2022-06-29T15:04:47Z
day: '10'
doi: 10.1016/0005-2728(95)00096-2
extern: '1'
external_id:
pmid:
- '7578218'
intvolume: ' 1231'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/0005272895000962?via%3Dihub
month: '10'
oa: 1
oa_version: Published Version
page: 304 - 312
pmid: 1
publication: Biochimica et Biophysica Acta - Bioenergetics
publication_identifier:
issn:
- 0005-2728
publication_status: published
publisher: Elsevier
publist_id: '5142'
quality_controlled: '1'
status: public
title: Cyclic reactions catalysed by detergent-dispersed and reconstituted transhydrogenase
from beef heart mitochondria; implications for the mechanism of proton translocation
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 1231
year: '1995'
...
---
_id: '6162'
abstract:
- lang: eng
text: 'The tra-1 gene is the terminal global selector of somatic sex in Caenorhabditis
elegans: High tra-1 activity elicits female somatic development while low tra-1
activity elicits male development. Previous genetic studies defined a cascade
of negatively interacting genes that regulates tra-1 activity in response to the
primary sex-determining signal. Here, we investigate the last step in this regulatory
cascade, by studying rare gain-of-function (gf) mutations of tra-1 that direct
female somatic development irrespective of the upstream sex-determining signal.
These mutations appear to abolish negative regulation of tra-1 in male tissues.
We identify the lesions associated with 29 of these mutations and find that all
affect a short stretch of amino acid residues present in both protein products
of the tra-1 gene. Twenty-six alleles are associated with single nonconservative
amino acid substitutions. Two alleles affect tra-1 RNA splicing and generate messages
that omit part or all of the exon encoding this short stretch. These results suggest
that sexual regulation of tra-1 is achieved post-translationally, by an inhibitory
protein-protein interaction. The amino acid stretch altered by the tra-1(gf) mutations
may define a site of interaction for negative regulators of tra-1. The stretch
includes a potential phosphorylation site for glycogen synthase kinase 3 and may
be conserved in the human gene GLI3, a homolog of tra-1 identified previously.'
author:
- first_name: Mario
full_name: de Bono, Mario
id: 4E3FF80E-F248-11E8-B48F-1D18A9856A87
last_name: de Bono
orcid: 0000-0001-8347-0443
- first_name: D.
full_name: Zarkower, D.
last_name: Zarkower
- first_name: J.
full_name: Hodgkin, J.
last_name: Hodgkin
citation:
ama: de Bono M, Zarkower D, Hodgkin J. Dominant feminizing mutations implicate protein-protein
interactions as the main mode of regulation of the nematode sex-determining gene
tra-1. Genes and Development. 1995;9(2):155-167. doi:10.1101/gad.9.2.155
apa: de Bono, M., Zarkower, D., & Hodgkin, J. (1995). Dominant feminizing mutations
implicate protein-protein interactions as the main mode of regulation of the nematode
sex-determining gene tra-1. Genes and Development. CSH Press. https://doi.org/10.1101/gad.9.2.155
chicago: Bono, Mario de, D. Zarkower, and J. Hodgkin. “Dominant Feminizing Mutations
Implicate Protein-Protein Interactions as the Main Mode of Regulation of the Nematode
Sex-Determining Gene Tra-1.” Genes and Development. CSH Press, 1995. https://doi.org/10.1101/gad.9.2.155.
ieee: M. de Bono, D. Zarkower, and J. Hodgkin, “Dominant feminizing mutations implicate
protein-protein interactions as the main mode of regulation of the nematode sex-determining
gene tra-1,” Genes and Development, vol. 9, no. 2. CSH Press, pp. 155–167,
1995.
ista: de Bono M, Zarkower D, Hodgkin J. 1995. Dominant feminizing mutations implicate
protein-protein interactions as the main mode of regulation of the nematode sex-determining
gene tra-1. Genes and Development. 9(2), 155–167.
mla: de Bono, Mario, et al. “Dominant Feminizing Mutations Implicate Protein-Protein
Interactions as the Main Mode of Regulation of the Nematode Sex-Determining Gene
Tra-1.” Genes and Development, vol. 9, no. 2, CSH Press, 1995, pp. 155–67,
doi:10.1101/gad.9.2.155.
short: M. de Bono, D. Zarkower, J. Hodgkin, Genes and Development 9 (1995) 155–167.
date_created: 2019-03-21T11:57:40Z
date_published: 1995-01-15T00:00:00Z
date_updated: 2021-01-12T08:06:29Z
day: '15'
doi: 10.1101/gad.9.2.155
extern: '1'
external_id:
pmid:
- '7851791'
intvolume: ' 9'
issue: '2'
language:
- iso: eng
month: '01'
oa_version: None
page: 155-167
pmid: 1
publication: Genes and Development
publication_identifier:
issn:
- '08909369'
publication_status: published
publisher: CSH Press
quality_controlled: '1'
status: public
title: Dominant feminizing mutations implicate protein-protein interactions as the
main mode of regulation of the nematode sex-determining gene tra-1
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '1995'
...
---
_id: '3454'
abstract:
- lang: eng
text: The study of gene expression and regulation in the central nervous system
(CNS) is a daunting task because of the diversity of neuronal phenotypes and the
complexity of many protein classes. Molecular cloning revealed the presence of
a large number of different protein families in the CNS, each comprising several
members. Ligand-gated ion channels may serve as an example to illustrate this
point (for review, see Unwin, 1993). Heterologous expression combined with electrophysiological
analysis suggests that ligand-gated channels are multimeric proteins with functional
properties depending on the subunit composition. Very little is known, however,
about how the functional properties of the recombinant and native receptors relate
to each other. Thus, it is of eminent importance to elucidate the subunit expression
profile in different types of neurons in the CNS and to correlate this with the
functional properties of the native receptors.
article_processing_charge: No
author:
- first_name: Hannah
full_name: Monyer, Hannah
last_name: Monyer
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
citation:
ama: 'Monyer H, Jonas PM. Polymerase chain reaction analysis of ion channel expression
in single neurons of brain slices. In: Sakmann B, Neher E, eds. Single-Channel
Recording. Plenum; 1995:357-373. doi:10.1007/978-1-4419-1229-9_16'
apa: Monyer, H., & Jonas, P. M. (1995). Polymerase chain reaction analysis of
ion channel expression in single neurons of brain slices. In B. Sakmann &
E. Neher (Eds.), Single-channel recording (pp. 357–373). Plenum. https://doi.org/10.1007/978-1-4419-1229-9_16
chicago: Monyer, Hannah, and Peter M Jonas. “Polymerase Chain Reaction Analysis
of Ion Channel Expression in Single Neurons of Brain Slices.” In Single-Channel
Recording, edited by Bert Sakmann and Erwin Neher, 357–73. Plenum, 1995. https://doi.org/10.1007/978-1-4419-1229-9_16.
ieee: H. Monyer and P. M. Jonas, “Polymerase chain reaction analysis of ion channel
expression in single neurons of brain slices,” in Single-channel recording,
B. Sakmann and E. Neher, Eds. Plenum, 1995, pp. 357–373.
ista: 'Monyer H, Jonas PM. 1995.Polymerase chain reaction analysis of ion channel
expression in single neurons of brain slices. In: Single-channel recording. ,
357–373.'
mla: Monyer, Hannah, and Peter M. Jonas. “Polymerase Chain Reaction Analysis of
Ion Channel Expression in Single Neurons of Brain Slices.” Single-Channel Recording,
edited by Bert Sakmann and Erwin Neher, Plenum, 1995, pp. 357–73, doi:10.1007/978-1-4419-1229-9_16.
short: H. Monyer, P.M. Jonas, in:, B. Sakmann, E. Neher (Eds.), Single-Channel Recording,
Plenum, 1995, pp. 357–373.
date_created: 2018-12-11T12:03:25Z
date_published: 1995-01-01T00:00:00Z
date_updated: 2022-06-28T09:13:01Z
day: '01'
doi: 10.1007/978-1-4419-1229-9_16
editor:
- first_name: Bert
full_name: Sakmann, Bert
last_name: Sakmann
- first_name: Erwin
full_name: Neher, Erwin
last_name: Neher
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://link.springer.com/chapter/10.1007/978-1-4419-1229-9_16
month: '01'
oa_version: None
page: 357 - 373
publication: Single-channel recording
publication_identifier:
isbn:
- 978-0-306-44870-6
publication_status: published
publisher: Plenum
publist_id: '2933'
quality_controlled: '1'
status: public
title: Polymerase chain reaction analysis of ion channel expression in single neurons
of brain slices
type: book_chapter
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
year: '1995'
...
---
_id: '3455'
abstract:
- lang: eng
text: At a synapse, the transmitter is stored in synaptic vesicles and is released
into the synaptic cleft almost instantaneously upon fusion of these vesicles with
the presynaptic membrane. Subsequently, the transmitter diffuses to ligand-gated
ion channels in the postsynaptic density, binds to them, and thereby causes channel
activation. Unfortunately, we have estimates neither of the exact amount of transmitter
in the synaptic vesicle nor of the concentration in the synaptic cleft reaching
the postsynaptic receptors, and in some cases even the identity of the transmitter
is unknown. These questions may be addressed by modeling of release and diffusion.
Such a theoretical approach, however, is based on several assumptions, some of
which lack experimental evidence.
article_processing_charge: No
author:
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
citation:
ama: 'Jonas PM. Fast application of agonists to isolated membrane patches. In: Sakmann
B, Neher E, eds. Single-Channel Recording. Plenum; 1995:231-243. doi:10.1007/978-1-4419-1229-9_10'
apa: Jonas, P. M. (1995). Fast application of agonists to isolated membrane patches.
In B. Sakmann & E. Neher (Eds.), Single-channel recording (pp. 231–243).
Plenum. https://doi.org/10.1007/978-1-4419-1229-9_10
chicago: Jonas, Peter M. “Fast Application of Agonists to Isolated Membrane Patches.”
In Single-Channel Recording, edited by Bert Sakmann and Erwin Neher, 231–43.
Plenum, 1995. https://doi.org/10.1007/978-1-4419-1229-9_10.
ieee: P. M. Jonas, “Fast application of agonists to isolated membrane patches,”
in Single-channel recording, B. Sakmann and E. Neher, Eds. Plenum, 1995,
pp. 231–243.
ista: 'Jonas PM. 1995.Fast application of agonists to isolated membrane patches.
In: Single-channel recording. , 231–243.'
mla: Jonas, Peter M. “Fast Application of Agonists to Isolated Membrane Patches.”
Single-Channel Recording, edited by Bert Sakmann and Erwin Neher, Plenum,
1995, pp. 231–43, doi:10.1007/978-1-4419-1229-9_10.
short: P.M. Jonas, in:, B. Sakmann, E. Neher (Eds.), Single-Channel Recording, Plenum,
1995, pp. 231–243.
date_created: 2018-12-11T12:03:25Z
date_published: 1995-01-01T00:00:00Z
date_updated: 2022-06-28T08:51:40Z
day: '01'
doi: 10.1007/978-1-4419-1229-9_10
editor:
- first_name: Bert
full_name: Sakmann, Bert
last_name: Sakmann
- first_name: Erwin
full_name: Neher, Erwin
last_name: Neher
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://link.springer.com/chapter/10.1007/978-1-4419-1229-9_10
month: '01'
oa_version: None
page: 231 - 243
publication: Single-channel recording
publication_identifier:
isbn:
- 978-0-306-44870-6
publication_status: published
publisher: Plenum
publist_id: '2932'
quality_controlled: '1'
status: public
title: Fast application of agonists to isolated membrane patches
type: book_chapter
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
year: '1995'
...
---
_id: '3461'
article_processing_charge: No
article_type: original
author:
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
- first_name: Nail
full_name: Burnashev, Nail
last_name: Burnashev
citation:
ama: Jonas PM, Burnashev N. Molecular mechanisms controlling calcium entry through
AMPA-type glutamate receptor channels. Neuron. 1995;15(5):987-990. doi:10.1016/0896-6273(95)90087-X
apa: Jonas, P. M., & Burnashev, N. (1995). Molecular mechanisms controlling
calcium entry through AMPA-type glutamate receptor channels. Neuron. Elsevier.
https://doi.org/10.1016/0896-6273(95)90087-X
chicago: Jonas, Peter M, and Nail Burnashev. “Molecular Mechanisms Controlling Calcium
Entry through AMPA-Type Glutamate Receptor Channels.” Neuron. Elsevier,
1995. https://doi.org/10.1016/0896-6273(95)90087-X.
ieee: P. M. Jonas and N. Burnashev, “Molecular mechanisms controlling calcium entry
through AMPA-type glutamate receptor channels,” Neuron, vol. 15, no. 5.
Elsevier, pp. 987–990, 1995.
ista: Jonas PM, Burnashev N. 1995. Molecular mechanisms controlling calcium entry
through AMPA-type glutamate receptor channels. Neuron. 15(5), 987–990.
mla: Jonas, Peter M., and Nail Burnashev. “Molecular Mechanisms Controlling Calcium
Entry through AMPA-Type Glutamate Receptor Channels.” Neuron, vol. 15,
no. 5, Elsevier, 1995, pp. 987–90, doi:10.1016/0896-6273(95)90087-X.
short: P.M. Jonas, N. Burnashev, Neuron 15 (1995) 987–990.
date_created: 2018-12-11T12:03:27Z
date_published: 1995-11-01T00:00:00Z
date_updated: 2022-06-28T08:34:36Z
day: '01'
doi: 10.1016/0896-6273(95)90087-X
extern: '1'
external_id:
pmid:
- '7576666'
intvolume: ' 15'
issue: '5'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/089662739590087X?via%3Dihub
month: '11'
oa: 1
oa_version: Published Version
page: 987 - 990
pmid: 1
publication: Neuron
publication_identifier:
issn:
- 0896-6273
publication_status: published
publisher: Elsevier
publist_id: '2926'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Molecular mechanisms controlling calcium entry through AMPA-type glutamate
receptor channels
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 15
year: '1995'
...
---
_id: '3478'
abstract:
- lang: eng
text: 1. Properties of dendritic glutamate receptor (GluR) channels were investigated
using fast application of glutamate to outside-out membrane patches isolated from
the apical dendrites of CA3 and CA1 pyramidal neurons in rat hippocampal slices.
CA3 patches were formed (15-76 μm from the soma) in the region of messy fibre
(MF) synapses, and CA1 patches (25-174 μm from the soma) in the region of Schaffer
collateral (SC) innervation. 2. Dual-component responses consisting of a rapidly
rising and decaying component followed by a second, substantially slower, component
were elicited by 1 ms pulses of 1 mM glutamate in the presence of 10 μM glycine
and absence of external Mg2+. The fast component was selectively blocked by 2-5
μM 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX) and the slow component by 30 μM
D-2-amino-5-phosphonopentanoic acid (D-AP5), suggesting that the fast and slow
components were mediated by the GluR channels of the L-α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate
(AMPA) and NMDA type, respectively. The peak amplitude ratio of the NMDA to AMPA
receptor-mediated components varied between 0.03 and 0.62 in patches from both
CA3 and CA1 dendrites. Patches lacking either component were rarely observed.
3. The peak current-voltage (I-V) relationship of the fast component was almost
linear, whereas the I-V relationship of the slow component showed a region of
negative slope in the presence of 1 mM external Mg2+. The reversal potential for
both components was close to 0 mV. 4. Kainate-preferring GluR channels did not
contribute appreciably to the response to glutamate. The responses to 100 ms pulses
of 1 mM glutamate were mimicked by application of 1 mM AMPA, whereas 1 mM kainate
produced much smaller, weakly desensitizing currents. This suggests that the fast
component is primarily mediated by the action of glutamate on AMPA-preferring
receptors. 5. The mean elementary conductance of AMPA receptor channels was about
10 pS, as estimated by non-stationary fluctuation analysis. The permeability of
these channels to Ca2+ was low (~5% of the permeability to Cs+). 6. The elementary
conductance of NMDA receptor channels was larger, with a main conductance state
of about 45 pS. These channels were 3.6 times more permeable to Ca2+ than to Cs+.
7. AMPA receptor-mediated currents activated rapidly in response to 1 ms pulses
of 1 mM glutamate and deactivated with a predominant, fast time constant and a
smaller, slower component (τ1≃2 ms, τ2≃8 ms, contributing ~80 and ~20% to the
total decay amplitude, respectively). Desensitization of the current during a
100 ms pulse was best fitted by two time constants (τ1≃10 ms, ~60%; τ2≃34 ms,
~40%). 8. NMDA receptor-mediated currents in response to 1 ms pulses of 1 mM glutamate
activated and deactivated much more slowly than AMPA receptor-mediated currents.
The time course could be described by a single exponential rising phase (τ≃7 ms)
followed by a double exponential decay (τ1≃200 ms, ~80%; τ2≃1-3 s, ~20%). 9. Mg2+
blocked the NMDA component in a voltage-dependent manner, with a half-maximal
inhibitory concentration (IC50) of 21 μM at -80 mV. At physiological Mg2+ concentrations,
block of the NMDA component could be rapidly relieved with voltage jumps from
negative to positive potentials. Block of the current upon return to negative
potentials occurred almost instantaneously. 10. Zn2+ also selectively-blocked
the NMDA receptor-mediated current with an IC50 of 22 μM, but this block differed
from that of Mg2+ in that it showed little voltage dependence. Rapid application
of Zn2+ together with glutamate produced partial block of the current. More block
was observed if Zn2+ and glutamate were co-applied when NMDA receptor channels
were already open. 11. The functional properties of dendritic GluRs were similar
to those found at the soma. Knowledge of these properties facilitated simulations
investigating the contribution of coactivated AMPA and NMDA receptors to synaptic
depolarization and Ca2+ entry into dendritic spines. Because of its slow deactivation,
the NMDA receptor-mediated current contributes substantially to depolarization
and Ca2+ entry and is susceptible to modulation over a period of seconds, either
by backpropagating action potentials or by the release of Zn2+ from presynaptic
boutons.
acknowledgement: We thank M.Hausser, A.Roth, P.Ruppersberg, and G.Stuart for helpful
discussions and M.H. and G.S. for critically reading the manuscript. We also thank
M.Kaiser for expert technical assistance and F.Helmchen, M.Huke and A.Roth for computer
programming. Financial support from the Alexander von Humboldt Foundation and the
Deutsche Forschungsgemeinschaft (SFB317) is gratefully acknowledged.
article_processing_charge: No
article_type: original
author:
- first_name: Nelson
full_name: Spruston, Nelson
last_name: Spruston
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
- first_name: Bert
full_name: Sakmann, Bert
last_name: Sakmann
citation:
ama: Spruston N, Jonas PM, Sakmann B. Dendritic glutamate receptor channels in rat
hippocampal CA3 and CA1 pyramidal neurons. Journal of Physiology. 1995;482(Pt
2):325-352. doi:10.1113/jphysiol.1995.sp020521
apa: Spruston, N., Jonas, P. M., & Sakmann, B. (1995). Dendritic glutamate receptor
channels in rat hippocampal CA3 and CA1 pyramidal neurons. Journal of Physiology.
Wiley-Blackwell. https://doi.org/10.1113/jphysiol.1995.sp020521
chicago: Spruston, Nelson, Peter M Jonas, and Bert Sakmann. “Dendritic Glutamate
Receptor Channels in Rat Hippocampal CA3 and CA1 Pyramidal Neurons.” Journal
of Physiology. Wiley-Blackwell, 1995. https://doi.org/10.1113/jphysiol.1995.sp020521.
ieee: N. Spruston, P. M. Jonas, and B. Sakmann, “Dendritic glutamate receptor channels
in rat hippocampal CA3 and CA1 pyramidal neurons,” Journal of Physiology,
vol. 482, no. Pt 2. Wiley-Blackwell, pp. 325–352, 1995.
ista: Spruston N, Jonas PM, Sakmann B. 1995. Dendritic glutamate receptor channels
in rat hippocampal CA3 and CA1 pyramidal neurons. Journal of Physiology. 482(Pt
2), 325–352.
mla: Spruston, Nelson, et al. “Dendritic Glutamate Receptor Channels in Rat Hippocampal
CA3 and CA1 Pyramidal Neurons.” Journal of Physiology, vol. 482, no. Pt
2, Wiley-Blackwell, 1995, pp. 325–52, doi:10.1113/jphysiol.1995.sp020521.
short: N. Spruston, P.M. Jonas, B. Sakmann, Journal of Physiology 482 (1995) 325–352.
date_created: 2018-12-11T12:03:32Z
date_published: 1995-01-15T00:00:00Z
date_updated: 2022-06-28T08:08:40Z
day: '15'
doi: 10.1113/jphysiol.1995.sp020521
extern: '1'
external_id:
pmid:
- '7536248'
intvolume: ' 482'
issue: Pt 2
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://physoc.onlinelibrary.wiley.com/doi/abs/10.1113/jphysiol.1995.sp020521
month: '01'
oa: 1
oa_version: Published Version
page: 325 - 352
pmid: 1
publication: Journal of Physiology
publication_identifier:
issn:
- 0022-3751
publication_status: published
publisher: Wiley-Blackwell
publist_id: '2909'
quality_controlled: '1'
status: public
title: Dendritic glutamate receptor channels in rat hippocampal CA3 and CA1 pyramidal
neurons
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 482
year: '1995'
...
---
_id: '3479'
abstract:
- lang: eng
text: 1. Glutamate receptor (GluR) channels were studied in basket cells in the
dentate gyrus of rat hippocampal slices. Basket cells were identified by their
location, dendritic morphology and high frequency of action potentials generated
during sustained current injection. 2. Dual-component currents were activated
by fast application of glutamate to outside-out membrane patches isolated from
basket cell somata (10 μM glycine, no external Mg2+). The fast component was selectively
blocked by 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX), the slow component by
D-2-amino-5-phosphonopentanoic acid (D-AP5). This suggests that the two components
were mediated by α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptor (AMPAR)/kainate
receptor and N-methyl-D-aspartate receptor (NMDAR) channels, respectively. The
mean ratio of the peak current of the NMDAR component to that of the AMPAR/kainate
receptor component was 0.22 (1 ms pulses of 10 mM glutamate). 3. The AMPAR/kainate
receptor component, which was studied in isolation in the presence of D-AP5, was
identified as AMPAR mediated on the basis of the preferential activation by AMPA
as compared with kainate, the weak desensitization of kainate-activated currents,
the cross-desensitization between AMPA and kainate, and the reduction of desensitization
by cyclothiazide. 4. Deactivation of basket cell AMPARs following 1 ms pulses
of glutamate occurred with a time constant (τ) of 1.2 ± 0.1 ms (mean ± S.E.M.).
During 100 ms glutamate pulses, AMPARs desensitized with a τ of 3.7 ± 0.2 ms.
5. The peak current-voltage (I-V) relation of AMPAR-mediated currents in Na+-rich
extracellular solution showed a reversal potential of -4.0 ± 2.6 mV and was characterized
by a doubly rectifying shape. The conductance of single AMPAR channels was estimated
as 22.6 ± 1.6 pS using non-stationary fluctuation analysis. AMPARs expressed in
hippocampal basket cells mere highly Ca2+ permeable (P(Ca)/P(K) = 1.79). 6. NMDARs
in hippocampal basket cells were studied in isolation in the presence of CNQX.
Deactivation of NMDARs activated by glutamate pulses occurred bi-exponentially
with mean τ values of 266 ± 23 ms (76%) and 2620 ± 383 ms (24%). 7. The peak I-V
relation of the NMDAR-mediated component in Na+-rich extracellular solution showed
a reversal potential of 1.5 ± 0.6 mV and a region of negative slope at negative
membrane potentials in the presence of external Mg2+, due to voltage-dependent
block by these ions. The conductance of single NMDAR channels in the main open
state was 50.2 ± 1.8 pS. NMDARs in hippocampal basket cells were highly permeable
to Ca2+ (P(Ca)/P(K) = 6.68). 8. AMPARs in hippocampal basket cells are characterized
by about threefold faster kinetics and twentyfold higher Ca2+ permeability than
AMPARs in hippocampal granule or pyramidal cells. Simulations show that the Ca2+
influx through basket cell AMPARs is comparable to that through NMDARs at negative
membrane potentials with physiological concentrations of Ca2+ and Mg2+. This suggests
a dual pathway of synaptically mediated Ca2+ entry into interneurones.
acknowledgement: We thank Drs M.Häusser and H.Markram for critically reading the manuscript
and M.Kaiser for technical assistance. Supported by the Deutsche Forschungsgemeinschaft
(SFB-317/B14 grant to P.J. and a Graduiertenkollegstipendium to J.R.P.G.)
article_processing_charge: No
article_type: original
author:
- first_name: Duk
full_name: Koh, Duk
last_name: Koh
- first_name: Jörg
full_name: Geiger, Jörg
last_name: Geiger
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
- first_name: Bert
full_name: Sakmann, Bert
last_name: Sakmann
citation:
ama: Koh D, Geiger J, Jonas PM, Sakmann B. Ca(2+)-permeable AMPA and NMDA receptor
channels in basket cells of rat hippocampal dentate gyrus. Journal of Physiology.
1995;485(Pt 2):383-402. doi:10.1113/jphysiol.1995.sp020737
apa: Koh, D., Geiger, J., Jonas, P. M., & Sakmann, B. (1995). Ca(2+)-permeable
AMPA and NMDA receptor channels in basket cells of rat hippocampal dentate gyrus.
Journal of Physiology. Wiley-Blackwell. https://doi.org/10.1113/jphysiol.1995.sp020737
chicago: Koh, Duk, Jörg Geiger, Peter M Jonas, and Bert Sakmann. “Ca(2+)-Permeable
AMPA and NMDA Receptor Channels in Basket Cells of Rat Hippocampal Dentate Gyrus.”
Journal of Physiology. Wiley-Blackwell, 1995. https://doi.org/10.1113/jphysiol.1995.sp020737.
ieee: D. Koh, J. Geiger, P. M. Jonas, and B. Sakmann, “Ca(2+)-permeable AMPA and
NMDA receptor channels in basket cells of rat hippocampal dentate gyrus,” Journal
of Physiology, vol. 485, no. Pt 2. Wiley-Blackwell, pp. 383–402, 1995.
ista: Koh D, Geiger J, Jonas PM, Sakmann B. 1995. Ca(2+)-permeable AMPA and NMDA
receptor channels in basket cells of rat hippocampal dentate gyrus. Journal of
Physiology. 485(Pt 2), 383–402.
mla: Koh, Duk, et al. “Ca(2+)-Permeable AMPA and NMDA Receptor Channels in Basket
Cells of Rat Hippocampal Dentate Gyrus.” Journal of Physiology, vol. 485,
no. Pt 2, Wiley-Blackwell, 1995, pp. 383–402, doi:10.1113/jphysiol.1995.sp020737.
short: D. Koh, J. Geiger, P.M. Jonas, B. Sakmann, Journal of Physiology 485 (1995)
383–402.
date_created: 2018-12-11T12:03:33Z
date_published: 1995-06-01T00:00:00Z
date_updated: 2022-06-28T07:54:44Z
day: '01'
doi: 10.1113/jphysiol.1995.sp020737
extern: '1'
external_id:
pmid:
- '7545230'
intvolume: ' 485'
issue: Pt 2
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1158000/pdf/jphysiol00319-0104.pdf
month: '06'
oa: 1
oa_version: Published Version
page: 383 - 402
pmid: 1
publication: Journal of Physiology
publication_identifier:
issn:
- 0022-3751
publication_status: published
publisher: Wiley-Blackwell
publist_id: '2908'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Ca(2+)-permeable AMPA and NMDA receptor channels in basket cells of rat hippocampal
dentate gyrus
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 485
year: '1995'
...
---
_id: '3480'
abstract:
- lang: eng
text: Recording of glutamate-activated currents in membrane patches was combine
with RT-PCR-mediated AMPA receptor (AMPAR) subunit mRNA analysis in single identified
cells of rat brain slices. Analysis of AMPARs in principal neurons end interneurons
of hippocampus and neocortex and in auditory relay neurons and Bergmann glial
cells indicates that the GluR-B subunit in its flip version determines formation
of receptors with relatively slow gating, whereas the GluR-D subunit promotes
assembly of more rapidly gated receptors. The relation between Ca 2+ permeability
of AMPAR channels and the relative GluR-B mRNA abundance is consistent with the
dominance of this subunit in determining the Ca 2+ permeability of native receptors.
The results suggest that differential expression of GluR-B and GluR-D subunit
genes, as well as splicing end editing of their mRNAs, account for the differences
in gating and Ca 2+ permeability of native AMPAR channels.
acknowledgement: "We thank Ulla Amtmann for efficient help with the molecular analysis.
We also thank M. Kaiser for technical assistance, Dr. J. G. G. Borst for advice
concerning preparation of brainstem slices, and Drs. N. Spruston and G. Stuart for
critically reading the manuscript. Funded in part by Bundesministerium für Forschung
und Technologie grant BCT 364 AZ 321/7291 (P. H. S.) and by Deutsche Forschungsgemeinschaftgrant
SFB-3171814(P. J.). J. R. P. G. and T. M. were supported by the graduate program
of Molecular and Cellular Neurobiology of the University of Heidelberg. The costs
of publication of this article were defrayed in part by the payment of page charges.
This article must therefore be hereby\r\nmarked “advertisement” in accordance with
18 USC Section 1734 solely to Indicate this fact."
article_processing_charge: No
article_type: original
author:
- first_name: Jörg
full_name: Geiger, Jörg
last_name: Geiger
- first_name: Thorsten
full_name: Melcher, Thorsten
last_name: Melcher
- first_name: Duk
full_name: Koh, Duk
last_name: Koh
- first_name: Bert
full_name: Sakmann, Bert
last_name: Sakmann
- first_name: Peter
full_name: Seeburg, Peter
last_name: Seeburg
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
- first_name: Hannah
full_name: Monyer, Hannah
last_name: Monyer
citation:
ama: Geiger J, Melcher T, Koh D, et al. Relative abundance of subunit mRNAs determines
gating and Ca(2+) permeability of AMPA receptors in principal neurons and interneurons
in rat CNS. Neuron. 1995;15(1):193-204. doi:10.1016/0896-6273(95)90076-4
apa: Geiger, J., Melcher, T., Koh, D., Sakmann, B., Seeburg, P., Jonas, P. M., &
Monyer, H. (1995). Relative abundance of subunit mRNAs determines gating and Ca(2+)
permeability of AMPA receptors in principal neurons and interneurons in rat CNS.
Neuron. Elsevier. https://doi.org/10.1016/0896-6273(95)90076-4
chicago: Geiger, Jörg, Thorsten Melcher, Duk Koh, Bert Sakmann, Peter Seeburg, Peter
M Jonas, and Hannah Monyer. “Relative Abundance of Subunit MRNAs Determines Gating
and Ca(2+) Permeability of AMPA Receptors in Principal Neurons and Interneurons
in Rat CNS.” Neuron. Elsevier, 1995. https://doi.org/10.1016/0896-6273(95)90076-4.
ieee: J. Geiger et al., “Relative abundance of subunit mRNAs determines gating
and Ca(2+) permeability of AMPA receptors in principal neurons and interneurons
in rat CNS,” Neuron, vol. 15, no. 1. Elsevier, pp. 193–204, 1995.
ista: Geiger J, Melcher T, Koh D, Sakmann B, Seeburg P, Jonas PM, Monyer H. 1995.
Relative abundance of subunit mRNAs determines gating and Ca(2+) permeability
of AMPA receptors in principal neurons and interneurons in rat CNS. Neuron. 15(1),
193–204.
mla: Geiger, Jörg, et al. “Relative Abundance of Subunit MRNAs Determines Gating
and Ca(2+) Permeability of AMPA Receptors in Principal Neurons and Interneurons
in Rat CNS.” Neuron, vol. 15, no. 1, Elsevier, 1995, pp. 193–204, doi:10.1016/0896-6273(95)90076-4.
short: J. Geiger, T. Melcher, D. Koh, B. Sakmann, P. Seeburg, P.M. Jonas, H. Monyer,
Neuron 15 (1995) 193–204.
date_created: 2018-12-11T12:03:33Z
date_published: 1995-07-01T00:00:00Z
date_updated: 2022-06-28T07:47:09Z
day: '01'
doi: 10.1016/0896-6273(95)90076-4
extern: '1'
external_id:
pmid:
- '7619522'
intvolume: ' 15'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/0896627395900764?via%3Dihub
month: '07'
oa: 1
oa_version: Published Version
page: 193 - 204
pmid: 1
publication: Neuron
publication_identifier:
issn:
- 0896-6273
publication_status: published
publisher: Elsevier
publist_id: '2907'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Relative abundance of subunit mRNAs determines gating and Ca(2+) permeability
of AMPA receptors in principal neurons and interneurons in rat CNS
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 15
year: '1995'
...
---
_id: '3481'
abstract:
- lang: eng
text: 1. The influence of intracellular factors on current rectification of different
subtypes of native α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptors
(AMPARs) was studied in rat brain slices by combining fast application of glutamate
with patch pipette perfusion. 2. The peak current-voltage (I-V) relation of the
AMPARs expressed in Bergmann glial cells of cerebellum and dentate gyrus (DG)
basket cells of hippocampus was weakly rectifying in outside-out patches and nystatin-perforated
vesicles, but showed a doubly rectifying shape with a region of reduced slope
between 0 and +40 mV in nucleated patches. The I-V relation of AMPARs expressed
in hippocampal CA3 pyramidal neurones was linear in all recording configurations.
3. Intracellular application of 2.5 μM spermine, a naturally occurring polyamine,
blocked outward currents in outside-oat patches from Bergmann glial cells and
DG basket cells in a voltage-dependent manner, generating I-V relations with a
doubly rectifying shape which were similar to those recorded in nucleated patches.
AMPARs in CA3 pyramidal cell patches were unaffected by 25 μM spermine. 4. The
half-maximal blocking concentration of spermine at +40 mV was 0.3 μM in Bergmann
glial cell patches and 1.5 μM in DG basket cell patches, whereas it was much higher
(≥ 100 μM) for CA3 pyramidal. cell patches. Spermidine also affected current rectification,
but with lower affinity. The block of outward current by polyamines following
voltage jumps developed within < 0.5 ms. 5. We conclude that current rectification,
rather than being an intrinsic property of the Ca2+ permeable AMPAR channel, is
generated by polyamine block.
acknowledgement: We thank Dr B.Sakmann, Dr V.Witzemann, J.Geiger, and A.Roth for helpful
discussions and Dr D.Feldmeyer and Dr A.Villarroel for reading the manuscript. We
also thank M.Kaiser for technical and H.Spiegel for secretarial assistance. Supported
by DFG grant SFB-317/B14(P.J.).
article_processing_charge: No
article_type: original
author:
- first_name: Duk
full_name: Koh, Duk
last_name: Koh
- first_name: Nail
full_name: Burnashev, Nail
last_name: Burnashev
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
citation:
ama: Koh D, Burnashev N, Jonas PM. Block of native Ca(2+)-permeable AMPA receptors
in rat brain by intracellular polyamines generates double rectification. Journal
of Physiology. 1995;486(Pt 2):305-312. doi:10.1113/jphysiol.1995.sp020813
apa: Koh, D., Burnashev, N., & Jonas, P. M. (1995). Block of native Ca(2+)-permeable
AMPA receptors in rat brain by intracellular polyamines generates double rectification.
Journal of Physiology. Wiley-Blackwell. https://doi.org/10.1113/jphysiol.1995.sp020813
chicago: Koh, Duk, Nail Burnashev, and Peter M Jonas. “Block of Native Ca(2+)-Permeable
AMPA Receptors in Rat Brain by Intracellular Polyamines Generates Double Rectification.”
Journal of Physiology. Wiley-Blackwell, 1995. https://doi.org/10.1113/jphysiol.1995.sp020813.
ieee: D. Koh, N. Burnashev, and P. M. Jonas, “Block of native Ca(2+)-permeable AMPA
receptors in rat brain by intracellular polyamines generates double rectification,”
Journal of Physiology, vol. 486, no. Pt 2. Wiley-Blackwell, pp. 305–312,
1995.
ista: Koh D, Burnashev N, Jonas PM. 1995. Block of native Ca(2+)-permeable AMPA
receptors in rat brain by intracellular polyamines generates double rectification.
Journal of Physiology. 486(Pt 2), 305–312.
mla: Koh, Duk, et al. “Block of Native Ca(2+)-Permeable AMPA Receptors in Rat Brain
by Intracellular Polyamines Generates Double Rectification.” Journal of Physiology,
vol. 486, no. Pt 2, Wiley-Blackwell, 1995, pp. 305–12, doi:10.1113/jphysiol.1995.sp020813.
short: D. Koh, N. Burnashev, P.M. Jonas, Journal of Physiology 486 (1995) 305–312.
date_created: 2018-12-11T12:03:33Z
date_published: 1995-07-15T00:00:00Z
date_updated: 2022-06-27T14:53:16Z
day: '15'
doi: 10.1113/jphysiol.1995.sp020813
extern: '1'
external_id:
pmid:
- '7473198'
intvolume: ' 486'
issue: Pt 2
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1156754/
month: '07'
oa: 1
oa_version: Published Version
page: 305 - 312
pmid: 1
publication: Journal of Physiology
publication_identifier:
issn:
- 0022-3751
publication_status: published
publisher: Wiley-Blackwell
publist_id: '2906'
quality_controlled: '1'
status: public
title: Block of native Ca(2+)-permeable AMPA receptors in rat brain by intracellular
polyamines generates double rectification
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 486
year: '1995'
...
---
_id: '3551'
abstract:
- lang: eng
text: Common geometric models for proteins and other molecules are the space filling
diagram, the solvent accessible surface, and the molecular surface. We describe
software that computes metric properties of these models, including volume and
surface area. It also measures voids or empty space enclosed by the protein, and
it keeps track of surface area contributions of individual atoms. The software
is based on 3-dimensional alpha complexes and on inclusion-exclusion formulas
with terms derived from the simplices in this complex.
article_processing_charge: No
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Michael
full_name: Facello, Michael
last_name: Facello
- first_name: Ping
full_name: Fu, Ping
last_name: Fu
- first_name: Jie
full_name: Liang, Jie
last_name: Liang
citation:
ama: 'Edelsbrunner H, Facello M, Fu P, Liang J. Measuring proteins and voids in
proteins. In: Proceedings of the 28th Annual Hawaii International Conference
on System Sciences. IEEE; 1995:256-264. doi:10.1109/HICSS.1995.375331'
apa: 'Edelsbrunner, H., Facello, M., Fu, P., & Liang, J. (1995). Measuring proteins
and voids in proteins. In Proceedings of the 28th Annual Hawaii International
Conference on System Sciences (pp. 256–264). Wailea, HI, United States of
America: IEEE. https://doi.org/10.1109/HICSS.1995.375331'
chicago: Edelsbrunner, Herbert, Michael Facello, Ping Fu, and Jie Liang. “Measuring
Proteins and Voids in Proteins.” In Proceedings of the 28th Annual Hawaii International
Conference on System Sciences, 256–64. IEEE, 1995. https://doi.org/10.1109/HICSS.1995.375331.
ieee: H. Edelsbrunner, M. Facello, P. Fu, and J. Liang, “Measuring proteins and
voids in proteins,” in Proceedings of the 28th Annual Hawaii International
Conference on System Sciences, Wailea, HI, United States of America, 1995,
pp. 256–264.
ista: 'Edelsbrunner H, Facello M, Fu P, Liang J. 1995. Measuring proteins and voids
in proteins. Proceedings of the 28th Annual Hawaii International Conference on
System Sciences. HICSS: Hawaii International Conference on System Sciences, 256–264.'
mla: Edelsbrunner, Herbert, et al. “Measuring Proteins and Voids in Proteins.” Proceedings
of the 28th Annual Hawaii International Conference on System Sciences, IEEE,
1995, pp. 256–64, doi:10.1109/HICSS.1995.375331.
short: H. Edelsbrunner, M. Facello, P. Fu, J. Liang, in:, Proceedings of the 28th
Annual Hawaii International Conference on System Sciences, IEEE, 1995, pp. 256–264.
conference:
end_date: 1995-01-06
location: Wailea, HI, United States of America
name: 'HICSS: Hawaii International Conference on System Sciences'
start_date: 1995-01-03
date_created: 2018-12-11T12:03:55Z
date_published: 1995-01-04T00:00:00Z
date_updated: 2022-06-27T13:54:41Z
day: '04'
doi: 10.1109/HICSS.1995.375331
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://ieeexplore.ieee.org/document/375331
month: '01'
oa_version: None
page: 256 - 264
publication: Proceedings of the 28th Annual Hawaii International Conference on System
Sciences
publication_identifier:
isbn:
- 0-8186-6930-6
publication_status: published
publisher: IEEE
publist_id: '2834'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Measuring proteins and voids in proteins
type: conference
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
year: '1995'
...
---
_id: '3552'
abstract:
- lang: eng
text: "The concept of an α-shape of a finite set of points in R^d, with weights,
is defined and illustrated. An α-shape is a polytope which is not necessarily
convex nor connected and can be derived from the (weighted) Delaunay triangulation
of the point set, with a parameter controlling the desired level of detail. The
set of all α values leads to a descrete family of shapes capturing the intuitive
notion of ``crude'' versus ``fine'' shapes of a point set. Software that computes
such shapes in R^2 and R^3 is available via anonymous ftp from:\r\n\r\nftp://ftp.ncsa.uiuc.edu/Visualization/Alpha-shape/
\ "
article_processing_charge: No
author:
- first_name: Nataraj
full_name: Akkiraju, Nataraj
last_name: Akkiraju
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Michael
full_name: Facello, Michael
last_name: Facello
- first_name: Ping
full_name: Fu, Ping
last_name: Fu
- first_name: Ernst
full_name: Mücke, Ernst
last_name: Mücke
- first_name: Carlos
full_name: Varela, Carlos
last_name: Varela
citation:
ama: 'Akkiraju N, Edelsbrunner H, Facello M, Fu P, Mücke E, Varela C. Alpha shapes:
definition and software. In: Elsevier; 1995:63-66.'
apa: 'Akkiraju, N., Edelsbrunner, H., Facello, M., Fu, P., Mücke, E., & Varela,
C. (1995). Alpha shapes: definition and software (pp. 63–66). Presented at the
GCG: International Computational Geometry Software Workshop, Elsevier.'
chicago: 'Akkiraju, Nataraj, Herbert Edelsbrunner, Michael Facello, Ping Fu, Ernst
Mücke, and Carlos Varela. “Alpha Shapes: Definition and Software,” 63–66. Elsevier,
1995.'
ieee: 'N. Akkiraju, H. Edelsbrunner, M. Facello, P. Fu, E. Mücke, and C. Varela,
“Alpha shapes: definition and software,” presented at the GCG: International Computational
Geometry Software Workshop, 1995, pp. 63–66.'
ista: 'Akkiraju N, Edelsbrunner H, Facello M, Fu P, Mücke E, Varela C. 1995. Alpha
shapes: definition and software. GCG: International Computational Geometry Software
Workshop, 63–66.'
mla: 'Akkiraju, Nataraj, et al. Alpha Shapes: Definition and Software. Elsevier,
1995, pp. 63–66.'
short: N. Akkiraju, H. Edelsbrunner, M. Facello, P. Fu, E. Mücke, C. Varela, in:,
Elsevier, 1995, pp. 63–66.
conference:
name: 'GCG: International Computational Geometry Software Workshop'
date_created: 2018-12-11T12:03:55Z
date_published: 1995-09-11T00:00:00Z
date_updated: 2022-06-27T13:20:29Z
day: '11'
extern: '1'
language:
- iso: eng
main_file_link:
- url: http://www.geom.uiuc.edu/software/cglist/GeomDir/shapes95def/
month: '09'
oa_version: None
page: 63 - 66
publication_status: published
publisher: Elsevier
publist_id: '2833'
quality_controlled: '1'
status: public
title: 'Alpha shapes: definition and software'
type: conference
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
year: '1995'
...
---
_id: '3597'
article_processing_charge: No
author:
- first_name: Mark
full_name: Kirkpatrick, Mark
last_name: Kirkpatrick
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Kirkpatrick M, Barton NH. Déjà vu all over again. Nature. 1995;377:388-389.
doi:10.1038/377388a0
apa: Kirkpatrick, M., & Barton, N. H. (1995). Déjà vu all over again. Nature.
Nature Publishing Group. https://doi.org/10.1038/377388a0
chicago: Kirkpatrick, Mark, and Nicholas H Barton. “Déjà vu All over Again.” Nature.
Nature Publishing Group, 1995. https://doi.org/10.1038/377388a0.
ieee: M. Kirkpatrick and N. H. Barton, “Déjà vu all over again,” Nature,
vol. 377. Nature Publishing Group, pp. 388–389, 1995.
ista: Kirkpatrick M, Barton NH. 1995. Déjà vu all over again. Nature. 377, 388–389.
mla: Kirkpatrick, Mark, and Nicholas H. Barton. “Déjà vu All over Again.” Nature,
vol. 377, Nature Publishing Group, 1995, pp. 388–89, doi:10.1038/377388a0.
short: M. Kirkpatrick, N.H. Barton, Nature 377 (1995) 388–389.
date_created: 2018-12-11T12:04:09Z
date_published: 1995-10-05T00:00:00Z
date_updated: 2022-06-27T13:00:10Z
day: '05'
doi: 10.1038/377388a0
extern: '1'
external_id:
pmid:
- '7566112 '
intvolume: ' 377'
language:
- iso: eng
main_file_link:
- url: https://www.nature.com/articles/377388a0
month: '10'
oa_version: None
page: 388 - 389
pmid: 1
publication: Nature
publication_identifier:
issn:
- 0028-0836
publication_status: published
publisher: Nature Publishing Group
publist_id: '2786'
quality_controlled: '1'
status: public
title: Déjà vu all over again
type: review
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 377
year: '1995'
...
---
_id: '3636'
abstract:
- lang: eng
text: 'Observations on the means, variances, and covariances of quantitative traits
across hybrid zones can give information similar to that from Mendelian markers.
In addition, they can identify particular traits through which the cline is maintained.
We describe a survey of six traits across the hybrid zone between Bombina bombina
and Bombina variegata (Amphibia: Discoglossidae) near Pescenica in Croatia. We
obtained laboratory measuments of the belly pattern, skin thickness, mating call,
skeletal form, egg size, and the developmental time of tadpoles. Although offspring
from hybrid populations showed no evidence of reduced viability, a third of the
F1 families failed completely, irrespective of the direction of the cross. All
traits differed significantly between the taxa. Clines in belly pattern, skin
thickness, mating call, and skeletal form were closely concordant with clines
in four diagnostic enzyme loci. However, the cline in developmental time was displaced
towards bombina, and the cline in egg size was displaced towards variegata. This
discordance could be because the traits are not inherited additively or because
they are subject to different selection pressures. We favor the latter explanation
in the case of developmental time. We show that moderate selection acting directly
on a trait suffices to shift its position; rather stronger selection is needed
to change its width appreciably. Within hybrid populations, there are significant
associations among quantitative traits, and between traits and enzymes. Phenotypic
variances also increase in hybrid populations. These observations can be explained
by linkage disequilibria among the underlying loci. However, the average magnitude
of the covariance between traits is about half that expected from the linkage
disequilibria between enzyme loci. The discrepancy is not readily explained by
nonadditive gene action. This puzzle is now unresolved and calls for further investigation.'
acknowledgement: 'The project would not have been possible without F. Perovic''s extensive
knowledge of the natural history of the Pegdenica area, and his assistance in the
field. Particular thanks are due to the Perovie family for their generous hospitality.
The Croatian Museum of Natural History and the Croatian Ministry of the Environment
were helpful in granting all the necessary permits. J. Szymura assisted with allozyme
tech-niques and in sharing unpublished data from his original survey of the area.
M. Davidson and K. Grant prepared the histological specimens, and G. Patterson volunteered
time and expertise in X-raying our toads. All members of L. Partridge''s lab generously
provided us with toad food on a daily basis, in the form of uncountably many spare
Drosophila. G. Malarky and M. Oh stoically coped with much tedious toad care. We
thank W. G. Hill, L. Kruuk, D. Rand, J. Szymura, and an anonymous reviewer for helpful
comments on the manuscript. This research was supported by a grant from the Natural
Environment Research Council (GR3/8002) to N.B. '
article_processing_charge: No
article_type: original
author:
- first_name: Beate
full_name: Nürnberger, Beate
last_name: Nürnberger
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Catriona
full_name: Maccallum, Catriona
last_name: Maccallum
- first_name: Jason
full_name: Gilchrist, Jason
last_name: Gilchrist
- first_name: Michael
full_name: Appleby, Michael
last_name: Appleby
citation:
ama: Nürnberger B, Barton NH, Maccallum C, Gilchrist J, Appleby M. Natural selection
on quantitative traits in the Bombina hybrid zone. Evolution. 1995;49(6):1224-1238.
doi:10.1111/j.1558-5646.1995.tb04449.x
apa: Nürnberger, B., Barton, N. H., Maccallum, C., Gilchrist, J., & Appleby,
M. (1995). Natural selection on quantitative traits in the Bombina hybrid zone.
Evolution. Wiley-Blackwell. https://doi.org/10.1111/j.1558-5646.1995.tb04449.x
chicago: Nürnberger, Beate, Nicholas H Barton, Catriona Maccallum, Jason Gilchrist,
and Michael Appleby. “Natural Selection on Quantitative Traits in the Bombina
Hybrid Zone.” Evolution. Wiley-Blackwell, 1995. https://doi.org/10.1111/j.1558-5646.1995.tb04449.x.
ieee: B. Nürnberger, N. H. Barton, C. Maccallum, J. Gilchrist, and M. Appleby, “Natural
selection on quantitative traits in the Bombina hybrid zone,” Evolution,
vol. 49, no. 6. Wiley-Blackwell, pp. 1224–1238, 1995.
ista: Nürnberger B, Barton NH, Maccallum C, Gilchrist J, Appleby M. 1995. Natural
selection on quantitative traits in the Bombina hybrid zone. Evolution. 49(6),
1224–1238.
mla: Nürnberger, Beate, et al. “Natural Selection on Quantitative Traits in the
Bombina Hybrid Zone.” Evolution, vol. 49, no. 6, Wiley-Blackwell, 1995,
pp. 1224–38, doi:10.1111/j.1558-5646.1995.tb04449.x.
short: B. Nürnberger, N.H. Barton, C. Maccallum, J. Gilchrist, M. Appleby, Evolution
49 (1995) 1224–1238.
date_created: 2018-12-11T12:04:22Z
date_published: 1995-12-01T00:00:00Z
date_updated: 2022-06-27T12:58:02Z
day: '01'
doi: 10.1111/j.1558-5646.1995.tb04449.x
extern: '1'
intvolume: ' 49'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1558-5646.1995.tb04449.x
month: '12'
oa: 1
oa_version: Published Version
page: 1224 - 1238
publication: Evolution
publication_identifier:
issn:
- 0014-3820
publication_status: published
publisher: Wiley-Blackwell
publist_id: '2747'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Natural selection on quantitative traits in the Bombina hybrid zone
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 49
year: '1995'
...
---
_id: '3637'
abstract:
- lang: eng
text: 'Hybridizing taxa remain distinct for two main reasons. Natural selection
acts against hybrids either because of their incompatible genome, or because of
differential adaptation of the pure types across an environmental gradient. Here,
we provide experimental evidence that the location of the Bombina (Anura: Discoglossidae)
hybrid zone in Croatia is, at least in part, determined by differential adaptation.
B. bombina typically breeds in permanent water in the lowland, whereas B. variegata
reproduces in puddles at higher elevations. In a reciprocal translocation, pure
bombina and variegata tadpoles were introduced in equal proportions into lowland
pond enclosures and upland puddles. After three weeks, variegata exceeded bombina
in survival and growth in both habitats. The effect was most pronounced in puddles,
where the few surviving bombina tadpoles had hardly grown at all. In comparison
to variegata, the smaller hatchlings of bombina grew relatively faster in ponds,
but remained smaller in absolute terms. Nevertheless, B. bombina appears better
adapted to ponds than to puddles. The mechanisms by which variegata is excluded
from ponds remain to be demonstrated. These data show that habitat dependent selection
prevents the invasion of bombina tadpole traits into the variegata gene pool.
Given the strong linkage disequilibria in hybrid populations, differential selection
on tadpoles may be sufficient to maintain the integrity of the two gene pools.'
acknowledgement: We thank Franjo Perovioc for invaluable help in the field and the Perovioc
family for generous hospitality. Logistical and practical support was provided by the Croatian
Museum of Natural History in particular Bojan Lazar and Eduarrd Kletecki. The people
of Velesevec kindly tolerated our enclosure bags in their village pond. Stejpan
Ticeric generously provided a base for our work in Perkovec. Professor S. Jelaska of
the U niversity of Zagreb allowed us unlim ited access to her laboratory, where all tadpole
m easurem ents were taken. Loeske K ruuk carried out the electrophoretic analysis which established the taxonomic
significance of tadpole belly colour. We thank Ian Wilson for statistical advice
and Tim Halliday, Peter Jones, Loeske Kruuk, Jaroslav Pialek and two anonymous
referees for helpful comments on the manuscript. This research was supported by
a grant from the NERC (No. GR3/8002) to N.H.B.
article_processing_charge: No
article_type: original
author:
- first_name: Catriona
full_name: Maccallum, Catriona
last_name: Maccallum
- first_name: Beate
full_name: Nürnberger, Beate
last_name: Nürnberger
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Maccallum C, Nürnberger B, Barton NH. Experimental evidence for habitat dependent
selection in a Bombina hybrid zone. Proceedings of the Royal Society of London
Series B Biological Sciences. 1995;260(1359):257-264. doi:10.1098/rspb.1995.0089
apa: Maccallum, C., Nürnberger, B., & Barton, N. H. (1995). Experimental evidence
for habitat dependent selection in a Bombina hybrid zone. Proceedings of the
Royal Society of London Series B Biological Sciences. Royal Society of London.
https://doi.org/10.1098/rspb.1995.0089
chicago: Maccallum, Catriona, Beate Nürnberger, and Nicholas H Barton. “Experimental
Evidence for Habitat Dependent Selection in a Bombina Hybrid Zone.” Proceedings
of the Royal Society of London Series B Biological Sciences. Royal Society
of London, 1995. https://doi.org/10.1098/rspb.1995.0089.
ieee: C. Maccallum, B. Nürnberger, and N. H. Barton, “Experimental evidence for
habitat dependent selection in a Bombina hybrid zone,” Proceedings of the Royal
Society of London Series B Biological Sciences, vol. 260, no. 1359. Royal
Society of London, pp. 257–264, 1995.
ista: Maccallum C, Nürnberger B, Barton NH. 1995. Experimental evidence for habitat
dependent selection in a Bombina hybrid zone. Proceedings of the Royal Society
of London Series B Biological Sciences. 260(1359), 257–264.
mla: Maccallum, Catriona, et al. “Experimental Evidence for Habitat Dependent Selection
in a Bombina Hybrid Zone.” Proceedings of the Royal Society of London Series
B Biological Sciences, vol. 260, no. 1359, Royal Society of London, 1995,
pp. 257–64, doi:10.1098/rspb.1995.0089.
short: C. Maccallum, B. Nürnberger, N.H. Barton, Proceedings of the Royal Society
of London Series B Biological Sciences 260 (1995) 257–264.
date_created: 2018-12-11T12:04:22Z
date_published: 1995-06-22T00:00:00Z
date_updated: 2022-06-27T10:14:02Z
day: '22'
doi: 10.1098/rspb.1995.0089
extern: '1'
intvolume: ' 260'
issue: '1359'
language:
- iso: eng
main_file_link:
- url: https://royalsocietypublishing.org/doi/10.1098/rspb.1995.0089
month: '06'
oa_version: None
page: 257 - 264
publication: Proceedings of the Royal Society of London Series B Biological Sciences
publication_identifier:
issn:
- 0962-8452
publication_status: published
publisher: Royal Society of London
publist_id: '2746'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Experimental evidence for habitat dependent selection in a Bombina hybrid zone
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 260
year: '1995'
...