Article
Voltage sensors in domains III and IV, but not I and II, are immobilized by Na+ channel fast inactivation.
Neuron - 1 Jan 1999
Cha A, Ruben P C, George A L, Fujimoto E, Bezanilla F
Abstract excerpt
Using site-directed fluorescent labeling, we examined conformational changes in the S4 segment of each domain of the human skeletal muscle sodium channel (hSkM1). The fluorescence signals from S4 segments in domains I and II follow activation and are unaffected as fast inactivation settles. In contrast, the fluorescence signals from S4 segments in domains III and IV show kinetic components during activation and...
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