黏液虫巨型轴突离子电流动力学的温度依赖性。
Temperature dependence of the ionic current kinetics of Myxicola giant axons.
作者信息
Schauf C L
出版信息
J Physiol. 1973 Nov;235(1):197-205. doi: 10.1113/jphysiol.1973.sp010384.
Abstract
- The temperature dependence of the sodium and potassium conductances of Myxicola giant axons was studied in the range of 1-18 degrees C.2. Analysis of voltage clamp records for step depolarizations of 20-150 mV yielded Q(10)'s for g(Na), g(K), and g(1) of 1.3-1.5. The steady-state parameters m(infinity) (v), n(infinity) (v) were independent of temperature. The time constants had Q(10)'s of: 2.64 +/- 0.2 for tau(m); 2.56 +/- 0.2 for tau(h); 3.02 +/- 0.3 for tau(n).3. tau(h) determined from the effects of prepulse duration rather than the decline in sodium current during a step depolarization had a Q(10) of 2.47 +/- 0.2.
摘要
在1至18摄氏度的范围内研究了黏液虫巨大轴突钠电导和钾电导的温度依赖性。
对20至150毫伏的阶跃去极化电压钳记录进行分析，得出钠电导（g(Na)）、钾电导（g(K)）和漏电流电导（g(1)）的Q(10)值为1.3至1.5。稳态参数m(infinity)(v)、n(infinity)(v)与温度无关。时间常数的Q(10)值为：m时间常数（tau(m)）为2.64±0.2；h时间常数（tau(h)）为2.56±0.2；n时间常数（tau(n)）为3.02±0.3。
根据预脉冲持续时间的影响而非阶跃去极化期间钠电流的下降确定的h时间常数（tau(h)）的Q(10)值为2.47±0.2。
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