Article
Tail end of the s6 segment: role in permeation in shaker potassium channels.
The Journal of general physiology - 1 Jul 2002
Ding Shinghua, Horn Richard
Abstract excerpt
The permeation pathway in voltage-gated potassium channels has narrow constrictions at both the extracellular and intracellular ends. These constrictions might limit the flux of cations from one side of the membrane to the other. The extracellular constriction is the selectivity filter, whereas the intracellular bundle crossing is proposed to act as the activation gate that opens in response to a depolarization....
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