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Term:9-cis-epoxycarotenoid dioxygenase activity
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Accession:GO:0045549 term browser browse the term
Definition:Catalysis of the reactions: a 9-cis-epoxycarotenoid + O2 = 2-cis,4-trans-xanthoxin + a 12'-apo-carotenal; 9-cis-violaxanthin + O2 = 2-cis,4-trans-xanthoxin + (3S,5R,6S)-5,6-epoxy-3-hydroxy-5,6-dihydro-12'-apo-beta-caroten-12'-al; and 9'-cis-neoxanthin + O2 = 2-cis,4-trans-xanthoxin + (3S,5R,6R)-5,6-dihydroxy-6,7-didehydro-5,6-dihydro-12'-apo-beta-caroten-12'-al.
Synonyms:exact_synonym: 9-cis-epoxycarotenoid 11,12-dioxygenase activity;   nine-cis-epoxycarotenoid dioxygenase activity
 related_synonym: AtNCED3;   NCED;   PvNCED1;   VP14;   neoxanthin cleavage enzyme
 xref: EC:

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  molecular_function 19619
    catalytic activity 6006
      oxidoreductase activity 844
        dioxygenase activity 79
          oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen 27
            carotenoid dioxygenase activity 2
              9-cis-epoxycarotenoid dioxygenase activity 0
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