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ENZYME entry: EC 1.14.99.n4

Accepted Name
Carotenoid 9,10-dioxygenase.
Alternative Name(s)
Carotenoid 9,10(9',10')-cleavage dioxygenase.
Carotenoid cleavage dioxygenase.
Reaction catalysed
Zeaxanthin + 2 O(2) <=> 4,9-dimethyl-dodeca-2,4,6,8,10-pentaen-dial + 2 (3R)-3-hydroxy-beta-ionone
Comment(s)
Presumably the enzyme acts twice on zeaxanthin cleaving 3-hydroxy- beta-ionone off each 3-hydroxy end group.
Cross-references
UniProtKB/Swiss-Prot
O65572, CCD1_ARATH;  C3VEQ4, CCD1_ONCHC;  Q8LP17, CCD1_PEA;  
Q94IR2, CCD1_PHAVU;  Q84KG5, CCD_CROSA;  

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