protoporphyrin IX + 3 a quinol => protoporphyrinogen IX + 3 a quinone
protoporphyrin ix + 3 a quinol => protoporphyrinogen ix + 3 a quinone
protoporphyrin IX + 3 a quinol => protoporphyrinogen IX + 3 a quinone
protoporphyrin ix + 3 a quinol => protoporphyrinogen ix + 3 a quinone