all-trans-beta-carotene + O2 = beta-ionone + all-trans-10'-apo-beta-carotenal
all-trans-beta-carotene + o2 = beta-ionone + all-trans-10'-apo-beta-carotenal
all-trans-beta-carotene + O2 = beta-ionone + all-trans-10'-apo-beta-carotenal
all-trans-beta-carotene + o2 = beta-ionone + all-trans-10'-apo-beta-carotenal