This was exemplified by the findings that DQB1*0201 and DQB1*0302 [13], DRB1*03/04-DQB1*0302 [14, 15], and DRB1*03-DQA1*0502-DQB1*0201 (DR3-DQ2) were positively associated with type 2 diabetes [16]. The gene discussed is HLA-DRB1; the disease is type 2 diabetes mellitus.