Type 1 diabetes mellitus (T1DM) occurs due to autoimmunity against the beta cells of the pancreas that are involved in the formation of insulin, which results in insulin deficiency, whereas impaired insulin secretion, varying degrees of insulin resistance, and enhanced hepatic glucose production are the salient features of type 2 diabetes mellitus (T2DM) [1]. The gene discussed is INS; the disease is diabetes mellitus.