All of the following require pyridoxine as a co-factor except?: (A) ALA synthase, (B) Transamination, (C) Glycogen phosphorylase, (D) Transketolase
Answer is D. Pyridoxal phosphate (PLP) is a coenzyme for enzymes involved in the following raections: Transamination Decarboxylation Glycogen phosphorylase Cystathionine b-synthase and cystathioninase ALA synthase Kynureninase Thiamine is the coenzyme for transketolase reactions Reference: Harpers illustrated biochemistry 30th edition