Part of
magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase reaction
magnesium-protoporphyrin IX 13-monomethyl ester hydroxylase reaction
REX:0000543
magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 --> 13(1)-hydroxy-magnesium-protoporphyrin IX 13-monomethyl ester + NADP+ + H2O
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