label: carotene beta-ring hydroxylase activity
label_lc: carotene beta-ring hydroxylase activity
description: "Catalysis of the reaction: a carotene + a reduced electron acceptor + O2 = C3-hydroxylated carotene + an oxidized electron acceptor + H2O. This is a general reaction to represent the C3 hydroxylation of the beta ring of a carotene."