K^+ Channel in the Chara Plasmalemlna : Estimations of K^+ Channel Density and Single K^+ Channel Conductance
スポンサーリンク
概要
- 論文の詳細を見る
The electromotive force E and the conductance G of the Chara corallina plasmalemma were measured under voltage clamp conditions. In the depolarized voltage range less negative than -60 mV, E changed according to the Nernst equation for K^+, and G increased with the external K^+ concentration [K^+]. and also with the depolarization of the membrane potential. This is attributed to the voltage-dependent opening of the K^+ channels in the largely depolarized voltage region. The voltage-dependent increase of G was due to the increase of the number of open K^+ channels per unit area. The density of the total K^+ channels in the C. corallina plasmalemma was estimated to be about 6.50/(10 μm)^2. The single K+ channel conductance γK changed with the external [K^+]_o; it was 79.3, 86.1, 105.9, 119.0 pS for external [K^+]_o of 0.2, 0.5, 2.0 and 5.0 mM respectively.
- 日本植物生理学会の論文
著者
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Kishimoto Uichiro
Department of Biology, College of General Education, Osaka University
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Ohkawa Taka-aki
Department of Biology, College of General Education, Osaka University
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Ohkawa T
Dept. Biol. Sci. Fac. Life Environ. Sci. Shimane Univ.
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Ohkawa Taka-aki
Department Of Biological Sciences Faculty Of Life And Environmental Science Shimane University
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Tsutsui Izuo
Department of Cell Physiology, National Institute for Physiological Sciences
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Tsutsui I
Dept. Biomemb. Nat. Inst. Of Physiol.
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Tsutsui Izuo
Department Of Cell Physiology National Institute For Physiological Sciences
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Kishimoto U
Department Of Biology College Of General Education Osaka University
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Kishimoto Uichiro
Department Of Biology College Of General Education Osaka University
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