GCA_000012465.1 PMN2A_1654 definition protoporphyrin IX magnesium-chelatase GCA_000012465.1 PMN2A_1857 definition ferrochelatase GCA_000012465.1 PMN2A_0331 definition hydrogenobyrinic acid a,c-diamide cobaltochelatase GCA_000012465.1 PMN2A_0380 definition magnesium chelatase GCA_000012465.1 PMN2A_0698 definition protoporphyrin IX magnesium-chelatase