Tags: Enzyme.
Zeaxanthin epoxidase (EC 1.14.13.90 Zea-epoxidase) is an enzyme with system name zeaxanthinNAD(P)H:oxygen oxidoreductase. This enzyme catalyses the following chemical reaction zeaxanthin + 2 NAD(P)H + 2 H+ + 2 O2 violaxanthin + 2 NAD(P)+ + 2 H2O (overall reaction)(1a) zeaxanthin + NAD(P)H + H+ + O2 antheraxanthin + NAD(P)+ + H2O(1b) antheraxanthin + NAD(P)H + H+ + O2 violaxanthin + NAD(P)+ + H2OZeaxanthin epoxidase is a flavoprotein (FAD) that is active under conditions of low light.