The co-factor for glycogen phosphorylase in glycogenolysis is:: (A) Thiamine pyrophosphate, (B) Pyridoxal phosphate, (C) Citrate, (D) FAD
Answer is B. Glycogen phosphorylase catalyses the rate limiting step in glycogenolysis by catalyzing the phosphorolytic cleavage of glycogen to yield glucose 1-phosphate. Glycogen phosphorylase requires pyridoxal phosphate as its coenzyme.