- gibberellin 12-aldehyde oxidase activity
Catalysis of the reaction: gibberellin 12-aldehyde + NADPH + H+ + O2 = gibberellin 12 + NADP+ + H2O. This is the third of three successive reactions resulting in the oxidation of ent-kaurenoate (ent-kaurenoic acid) to gibberellin 12 (GA12).
- 9-cis-epoxycarotenoid dioxygenase activity
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.