Diabetes mellitus (DM) is a clinical syndrome with diverse aetiologies associated with persistently elevated blood glucose and disruptions of carbohydrate, fat and protein metabolism due to defective insulin secretion by the B cells of the pancreas or resistance to insulin use by the body.1,2,3 It is a disease that is common across the globe, and it affects people of all races and ethnic groups worldwide.1,2,4. The gene discussed is INS; the disease is diabetes mellitus.