These studies increased the number of confirmed T2D susceptibility loci to nine (PPARγ, KCNJ11, TCF7L2, CDKAL1, CDKN2A/B, IGF2BP2, HHEX/IDE, FTO, and SLC30A8) [13–18]. The gene discussed is KCNJ11; the disease is type 2 diabetes mellitus.