In both T1D and T2D, we found enrichment of monogenic forms of diabetes, as expected (Yang and Chan, 2016)—2 genes in T1D (RASGRP1, INS) and 8 in T2D (HNF1B, GCK, WFS1, KCNJ11, ABCC8, HNF1A, PPARG, SLC2A2). The gene discussed is HNF1A; the disease is type 1 diabetes mellitus.