Kv11.3 (erg3) is a member of the ether-a-go-go (EAG) subfamily of voltage-dependent K+ channels. The erg subfamily includes the closely related proteins Kv11.1 (erg1) and Kv11.2 (erg2) that possess the signature structure of the voltage-dependent K+ channels: six membrane-spanning domains with intracellular N and C termini. As with all voltage-dependent K+ channels the functional channel is a tetramer composed of four subunits. It has been suggested that the Kv11 subfamily members can form functional heteromultimers within the subfamily.
