Reaction catalyzed by carotenoid 4,4'-beta-ionone ring oxygenase (1.14.11.B16)
+
+
+
H2O
=
+
+
+
4
zeaxanthin
+
2-oxoglutarate
+
O2
+
H2O
=
astaxanthin
+
succinate
+
CO2
+
4 H+
