protoporphyrin IX + Fe++ => heme + 2 H+ (Gallus gallus)
protoporphyrin ix + fe++ => heme + 2 h+ (gallus gallus)
protoporphyrin IX + Fe++ => heme + 2 H+ (Gallus gallus)
protoporphyrin ix + fe++ => heme + 2 h+ (gallus gallus)