MCAT and type 2 diabetes mellitus: Variants in tRNAIle, tRNASer(UCN), tRNALys, MT-ND1, MT-ND4, MT-COX2, and MT-COX3 have been identified, including T3264C (tRNALeu(UUR)), T4291C (tRNAIle), T14709C and A14692G (tRNAGlu), and T10003C (tRNAGly), T3271C (tRNALeu), C3254A (tRNALeu), and A8344G (tRNALys), all linked to type 2 diabetes.