ID   1.14.13.90
DE   Zeaxanthin epoxidase.
AN   Zea-epoxidase.
CA   (1) Zeaxanthin + NAD(P)H + O(2) = antheraxanthin + NAD(P)(+) + H(2)O.
CA   (2) Antheraxanthin + NAD(P)H + O(2) = violaxanthin + NAD(P)(+) + H(2)O.
CF   FAD.
CC   -!- Active under conditions of low light.
CC   -!- Along with EC 1.10.99.3, this enzyme forms part of the xanthophyll
CC       (or violaxanthin) cycle, which is involved in protecting the plant
CC       against damage by excess light.
CC   -!- It will also epoxidize lutein in some higher-plant species.
DR   Q96375, ABA2_CAPAN ;  Q40412, ABA2_NICPL ;  O81360, ABA2_PRUAR ;
DR   P93236, ABA2_SOLLC ;
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