With Regard to Ion Channel Opening, the M1 Ligand-Binding Domain

Multiple Choice

With regard to ion channel opening, the M1 ligand-binding domain of Cys-loop receptors functionally corresponds to which of the following regions of voltage-activated ion channels?

A) S1 transmembrane domain
B) S1-S4 in its entirety
C) S4 transmembrane domain
D) S5-S6, which form the P-loop
E) S6 transmembrane uniquely