Reaction catalyzed by magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase (1.14.13.81)
+
NADPH
+
+
=
+
NADP+
+
H2O
magnesium-protoporphyrin IX 13-monomethyl ester
+
NADPH
+
H+
+
O2
=
magnesium-protochlorophyllide
+
NADP+
+
H2O
