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Anion and cation permeability of a chloride channel in rat hippocampal neurons.
Open accessAbstract
The ionic permeability of a voltage-dependent Cl channel of rat hippocampal neurons was studied with the patch-clamp method. The unitary conductance of this channel was approximately 30 pS in symmetrical 150 mM NaCl saline. Reversal potentials interpreted in terms of the Goldman-Hodgkin-Katz voltage equation indicate a Cl:Na permeability ratio of approximately 5:1 for conditions where there is a salt gradient. Many anions are permeant; permeability generally follows a lyotropic sequence. Permeant cations include Li, Na, K, and Cs. The unitary conductance does not saturate for NaCl concentrations up to 1 M. No Na current is observed when the anion Cl is replaced by the impermeant anion SO4. Unitary conductance depends on the cation species present. The channel is reversibly blocked by extracellular Zn or 9-anthracene carboxylic acid. Physiological concentrations of Ca or Mg do not affect the Na:Cl permeability ratio. The permeability properties of the channel are consistent with a permeation mechanism that involves an activated complex of an anionic site, an extrinsic cation, and an extrinsic anion.
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Cites
Cation selective glass electrodes and their mode of operation
Eisenman, G. (1962) · Biophysical Journal · doi:10.1016/s0006-3495(62)86959-8 · Cited by 852
Cited by
Chapter 12 Potassium currents in hippocampal pyramidal cells
Storm, J. F. (1990) · Progress in Brain Research · doi:10.1016/s0079-6123(08)61248-0 · Cited by 743
Anion Transport with Chalcogen Bonds
Benz, S., Macchione, M., Verolet, Q., Mareda, J., Sakai, N., & Matile, S. (2016) · Journal of the American Chemical Society · doi:10.1021/jacs.6b05779 · Cited by 297
Kirk, K., Horner, H. A., Elford, B. C., Ellory, J. C., & Newbold, C. I. (1994) · Journal of Biological Chemistry · doi:10.1016/s0021-9258(17)41868-0 · Cited by 268
Metadata
- Authors
- Franciolini, F., & Nonner, W.
- Venue
- The Journal of general physiology
- Publisher
- Rockefeller University Press
- Published
- 1987-10-01
- Volume
- 90
- Issue
- 4
- Pages
- 453-478
- ISSN
- 0022-1295 (ISSN-L)
- 1540-7748
- OpenAlex
- W2162019877
- Cited by
- 183
- References
- 1
- FWCI
- 3.83
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Franciolini, F., & Nonner, W. (1987). Anion and cation permeability of a chloride channel in rat hippocampal neurons. The Journal of general physiology. https://doi.org/10.1085/jgp.90.4.453
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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