obsolete beta-carotene 2,2'-beta-hydroxylase activity (obsolete GO:0102466)
OBSOLETE. Catalysis of the reaction: beta-carotene + 2 NADH + 2 H+ + 2 O2 = (2R,2'R)-dihydroxy-all-trans-beta-carotene + 2 NAD + 2 H2O.