31. This category only contains two transferases, and thus is one of the smallest categories of transferase . 32. HGPRT is a transferase that catalyzes conversion of hypoxanthine to inosine monophosphate and guanine to guanosine monophosphate. 33. It can also cause elevations in hepatic enzymes such as gamma-glutamyl transferase and alkaline phosphatase. 34. High levels of gamma-glutamyl transferase ( GGT ) help in diagnosing pathologies involving biliary obstruction. 35. CLOCK exhibits histone acetyl transferase ( HAT ) activity, which is enhanced by dimerization with BMAL1. 36. This enzyme is also called "'hydroxycinnamoyl coenzyme A-quinate transferase " '. 37. O-GlcNAc transferase is a part of a host of biological functions within the human body. 38. Cytosolic and membrane-bound forms of glutathione S-transferase are encoded by two distinct polymorphic. 39. The oxidized ascorbate ( monodehydroascorbate ) is regenerated by glutathione S-transferase omega 1 or glutaredoxins. 40. Glutathione S-transferase , ATP diphosphorylase, glycolytic enzymes have been detected with their biological roles.