ID   1.14.15.21
DE   zeaxanthin epoxidase.
AN   zea-epoxidase.
CA   all-trans-zeaxanthin + 4 H(+) + 2 O2 + 4 reduced [2Fe-2S]-[ferredoxin] =
CA   all-trans-violaxanthin + 2 H2O + 4 oxidized [2Fe-2S]-[ferredoxin].
CC   -!- Active under conditions of low light.
CC   -!- Along with EC 1.23.5.1, this enzyme forms part of the xanthophyll (or
CC       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.
CC   -!- Formerly EC 1.14.13.90.
DR   Q96375, ABA2_CAPAN ;  Q40412, ABA2_NICPL ;  O81360, ABA2_PRUAR ;
DR   P93236, ABA2_SOLLC ;  A0A0K9RDW0, ABA2_SPIOL ;  Q9FGC7, ZEP_ARATH  ;
DR   C3VEQ2, ZEP_ONCHC  ;  Q0JCU7, ZEP_ORYSJ  ;
//