Zeaxanthin epoxidase (, Zea-epoxidase) is an enzyme with systematic name zeaxanthin,NAD(P)H:oxygen oxidoreductase. This enzyme catalyses the following overall chemical reaction:
Zeaxanthin epoxidase is a flavoprotein that uses flavin adenine dinucleotide as a cofactor. It is active under conditions of low light and protects plants from damage by excess light.
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