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相似文献

1
Single potassium channel conductance in the frog node of Ranvier.蛙类朗飞结中单个钾离子通道的电导
Biophys J. 1984 Apr;45(4):855-8. doi: 10.1016/S0006-3495(84)84230-7.
2
Simultaneous changes in the equilibrium potential and potassium conductance in voltage clamped Ranvier node in the frog.青蛙有髓神经纤维郎飞结电压钳制下平衡电位与钾电导的同步变化。
J Physiol. 1981 Sep;318:279-95. doi: 10.1113/jphysiol.1981.sp013864.
3
Evidence for the existence of three types of potassium channels in the frog Ranvier node membrane.青蛙郎飞结膜中存在三种类型钾通道的证据。
J Physiol. 1981 Sep;318:297-316. doi: 10.1113/jphysiol.1981.sp013865.
4
Properties of the slow K+ current of the nodal membrane.结细胞膜慢钾电流的特性
J Physiol (Paris). 1981 May;77(9):1129-34.
5
[Participation of electrogenic ion transport in maintenance of the membrane potential of nodes of Ranvier in the frog].[电生性离子转运在维持蛙类郎飞结膜电位中的作用]
Fiziol Zh SSSR Im I M Sechenova. 1981 Jul;67(7):1084-8.
6
Non-stationary fluctuations of the potassium conductance at the node of ranvier of the frog.青蛙郎飞结处钾离子电导的非平稳波动
J Physiol. 1984 Aug;353:199-230. doi: 10.1113/jphysiol.1984.sp015332.
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Alteration of the conductance of Na+ channels in the nodal membrane of frog nerve by holding potential and tetrodotoxin.通过钳制电位和河豚毒素改变青蛙神经结膜中钠通道的电导。
Biochim Biophys Acta. 1983 Jan 5;727(1):177-84. doi: 10.1016/0005-2736(83)90382-6.
8
The variance of sodium current fluctuations at the node of Ranvier.郎飞结处钠电流波动的方差。
J Physiol. 1980 Oct;307:97-129. doi: 10.1113/jphysiol.1980.sp013426.
9
Potential-dependent calcium blockage of normal and aconitine-modified sodium channels in frog node of Ranvier.蛙类郎飞结中正常及乌头碱修饰钠通道的电位依赖性钙阻滞
Gen Physiol Biophys. 1985 Aug;4(4):425-7.
10
Potassium ion noise currents and inactivation in voltage-clamped node of Ranvier.
Nature. 1977 Jan 13;265(5590):177-9. doi: 10.1038/265177a0.

本文引用的文献

1
Fluctuation and linear analysis of Na-current kinetics in squid axon.鱿鱼轴突中钠电流动力学的波动与线性分析
Biophys J. 1983 Sep;43(3):293-307. doi: 10.1016/S0006-3495(83)84353-7.
2
Conditioning prepulses and kinetics of potassium conductance in the frog node.青蛙神经节中的条件预脉冲与钾电导动力学
J Membr Biol. 1982;70(1):27-35. doi: 10.1007/BF01871586.
3
Single channel K+ currents from HeLa cells.来自HeLa细胞的单通道钾离子电流。
J Membr Biol. 1983;74(1):41-9. doi: 10.1007/BF01870593.
4
Flickering of a nicotinic ion channel to a subconductance state.烟碱型离子通道闪烁至亚电导状态。
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Multiple conductance states of single acetylcholine receptor channels in embryonic muscle cells.胚胎肌肉细胞中单个乙酰胆碱受体通道的多种电导状态
Nature. 1981 Dec 3;294(5840):462-4. doi: 10.1038/294462a0.
6
The Cole-Moore effect in nodal membrane of the frog Rana ridibunda: evidence for fast and slow potassium channels.泽蛙节点膜中的科尔-穆尔效应：快速和慢速钾通道的证据。
J Membr Biol. 1980 Dec 30;57(3):179-93. doi: 10.1007/BF01869586.
7
Differences between K channels in motor and sensory nerve fibres of the frog as revealed by fluctuation analysis.波动分析揭示的青蛙运动和感觉神经纤维中钾通道的差异。
Pflugers Arch. 1980 Aug;387(1):9-16. doi: 10.1007/BF00580838.
8
Single channel recordings of K+ currents in squid axons.乌贼轴突中钾离子电流的单通道记录。
Nature. 1980 May 15;285(5761):140-3. doi: 10.1038/285140a0.
9
Membrane current and noise measurements in voltage-clamped node of Ranvier.在电压钳制的郎飞结处进行膜电流和噪声测量。
J Membr Biol. 1980 Dec 30;57(3):213-21. doi: 10.1007/BF01869589.
10
Inferences about membrane properties from electrical noise measurements.从电噪声测量推断膜特性。
Biophys J. 1972 Aug;12(8):1028-47. doi: 10.1016/S0006-3495(72)86141-1.

蛙类朗飞结中单个钾离子通道的电导

Single potassium channel conductance in the frog node of Ranvier.

作者信息

de Bruin G, Guy I, Van den Berg R J

出版信息

Biophys J. 1984 Apr;45(4):855-8. doi: 10.1016/S0006-3495(84)84230-7.

DOI:10.1016/S0006-3495(84)84230-7
PMID:6326879
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1434922/
Abstract

The single K+-channel conductance was calculated from the variance of the spontaneous potassium noise currents in voltage clamped frog node. Essential for this calculation is the mean potassium conductance during the noise measurement. So far this quantity has been underestimated, apparently due to K+-ion accumulation. With the proper values, the single K+-channel conductance is an increasing function of membrane voltage.

摘要

通过电压钳制的青蛙神经节中自发钾离子噪声电流的方差来计算单个钾离子通道的电导。该计算的关键在于噪声测量期间的平均钾离子电导。到目前为止，这个量一直被低估，显然是由于钾离子积累所致。使用合适的值，单个钾离子通道的电导是膜电压的递增函数。