Some of the currently used anti-diabetics include oral [e.g., biguanides, sulfonylureas (SUs), thiazolidinediones (TZDs), and dipeptidyl peptidase-IV (DPP-IV) inhibitors] (46) and injectable agents (e.g., insulin and GLP-1 analogs) (44). The gene discussed is DPP4; the disease is diabetes mellitus.