label: 9-cis-beta-carotene 9',10'-cleavage oxygenase activity
label_lc: 9-cis-beta-carotene 9',10'-cleavage oxygenase activity
description: "Catalysis of the reaction: 9-cis-beta-carotene + O2 = 9-cis-10'-apo-beta-carotenal + beta-ionone."