MinK endows the I(Ks) potassium channel pore with sensitivity to internal tetraethylammonium.


I(Ks) channels are heteromeric complexes of pore-forming KvLQT1 subunits and pore-associated MinK subunits. Channels formed only of KvLQT1 subunits vary from I(Ks) channels in their gating kinetics, single-channel conductance, and ion selectivity. Here we show that I(Ks) channels are more sensitive to blockade by internal tetraethylammonium ion (TEA) than… (More)


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