What is the principal mechanism of inactivation in voltage-activated channels?
A) Occlusion by elements of the ion channel that do not lie within the membrane
B) S6 helix closing off the cytoplasmic mouth of the channel
C) Displacement of S4 back to its "resting" position within the membrane
D) Inactivation, or current "switching off," of the P-loop, possibly involving the selectivity filter
E) Displacement f S6 back to its "resting" position within the membrane
Correct Answer:
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