9-cis-beta-carotene 9',10'-cleavage oxygenase activity
Catalysis of the reaction: 9-cis-beta-carotene + O2 = 9-cis-10'-apo-beta-carotenal + beta-ionone.
GO:0016702
oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen
is_a