FABP2 and diabetes mellitus: The G-to-A substitution at codon 54 of the FABP2 gene, which results in an alanine-to-threonine substitution at amino acid 54 (Ala54Thr) of I-FABP, has been reported to be associated with increased intestinal fat absorption (Agren et al., 1998; Levy et al., 2001), as well as FA oxidation, IR, and diabetes (Baier et al., 1995).