FABP2 genotypic frequencies of A54A, A54T, and T54T were 56.5%, 37.2%, and 6.3% in the control group, 51.52%, 39.81% and 8.66% in the T2DM group; allelic frequencies of Ala and Thr were 0.75 and 0.25 for the control group, 0.71 and 0.29 for the T2DM group. The gene discussed is FABP2; the disease is type 2 diabetes mellitus.