Biochemistry HAEM synth and porphyrias a74255de Porphyrin of normal erythrocyte haemoglobin is A Coproporphyrin I B Uroporphyrin III C Protoporphyrin III D Uroporphyrin I High-Yield Explanation Heme is iron containing protoporphyrin. Protoporphyrins are named according to the side chains, i.e. Methyl, vinyl, propionyl.