Reaction catalyzed by magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase (1.14.13.81)
+
3
NADPH
+
3
+
3
=
+
3
NADP+
+
5
H2O
magnesium-protoporphyrin IX 13-monomethyl ester
+
3 NADPH
+
3 H+
+
3 O2
=
3,8-divinyl protochlorophyllide a
+
3 NADP+
+
5 H2O
