Article
Irreversible block of cardiac mutant Na+ channels by batrachotoxin.
Channels (Austin, Tex.) - 1 Jan 2000
Wang Sho-Ya, Tikhonov Denis B, Mitchell Jane, Zhorov Boris S, Wang Ging Kuo
Abstract excerpt
Batrachotoxin (BTX) not only keeps the voltage-gated Na(+) channel open persistently but also reduces its single-channel conductance. Although a BTX receptor has been delimited within the inner cavity of Na(+) channels, how Na(+) ions flow through the BTX-bound permeation pathway remains unclear. In this report we tested a hypothesis that Na(+) ions traverse a narrow gap between bound BTX and residue N927 at D2S6...
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