abscisic acid 8'-hydroxylase / abscisic acid 9'-hydroxylase 1
(S)-Abscisic acid + Hydrogen Ion + NADPH + Oxygen → 9'-hydroxyabscisate + NADP + Water
zeaxanthin, antheraxanthin and violaxanthin interconversion
xanthoxin (→) Transport: Arabidopsis thaliana, Cell, Chloroplast to Arabidopsis thaliana, Cell, Cytosol
9'-cis-neoxanthin + Oxygen → C25-allenic-apo-aldehyde + xanthoxin
NAD + xanthoxin → Hydrogen Ion + NADH + abscisic aldehyde
Oxygen + Water + abscisic aldehyde → (S)-Abscisic acid + Hydrogen Ion + Hydrogen peroxide