protoporphyrinogen IX + 3 a menaquinone = protoporphyrin IX + 3 a menaquinol
protoporphyrinogen ix + 3 a menaquinone = protoporphyrin ix + 3 a menaquinol
protoporphyrinogen IX + 3 a menaquinone = protoporphyrin IX + 3 a menaquinol
protoporphyrinogen ix + 3 a menaquinone = protoporphyrin ix + 3 a menaquinol