Sodium voltage-gated channel beta subunits
sodium voltage-gated channel beta subunits
Sodium channels are voltage-gated sodium-selective ion channels present in the membrane of most excitable cells. Sodium channels comprise of one pore-forming alpha subunit, which may be associated with either one or two beta subunits. Auxiliary beta1, beta2, beta3 and beta4 subunits consist of a large extracellular N-terminal domain, a single transmembrane segment and a shorter cytoplasmic domain.