Rate limiting enzyme of Haem synthesis in erythroid tissue is:: (A) PBG deaminase, (B) Uroporphyrin II cosynthetase, (C) ALA synthase I, (D) ALA synthase II
Answer is D. RLE in Haem Synthesis is - ALA Synthase ALA Synthase I : Expressed throughout the body. (Rate limiting step in liver) ALA Synthase II: Expressed in erythroid tissues