A male patient came with pain in calf muscles in exercise. On biopsy glycogen present in the muscle. What is the enzyme eficiency?: (A) Branching enzyme, (B) Phosphofructokinase I, (C) Debranching enzyme, (D) Glucose 6 phosphatase
Answer is B. Ans. B. Phosphofructokinase INB: If Muscle phosphorylase is there then its the best answer/as McArdles is MC GSD in adolescent age. if its not there then PFK-1 is the answer