KCNQ1 and type 2 diabetes mellitus: Recently, KCNQ1 (potassium voltage gated channel, KQT-like subfamily, member1) was added to the candidate genes conferring susceptibility to T2DM.8 KCNQ1 is located at chromosome 11p15.5, and encodes the pore-forming potassium (K+) channel alpha-subunit.