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