protoporphyrinogen IX + 3 A = protoporphyrin IX + 3 AH2
protoporphyrinogen ix + 3 a = protoporphyrin ix + 3 ah2
protoporphyrinogen IX + 3 A = protoporphyrin IX + 3 AH2
protoporphyrinogen ix + 3 a = protoporphyrin ix + 3 ah2