1.14.99.63 alr3189, beta-C-4 oxygenase, beta-C-4-oxygenase, beta-carotene 4,4'-oxygenase, beta-carotene 4-monoketolase, beta-carotene ketolase, bkt, bkt1, BKT3, CrBKT, CrtO, CrtO beta-carotene ketolase, CrtO ketolase, crtS, CrtW, CrtW ketolase, CrtW148, CrtW38, DR0093, OBKT, ObktM, sCrBKT, slr0088 - -, 716454, 718623, 718626, 718690, 719487, 719794, 720799, 742396, 742573, 742948, 743205, 743873, 743898, 746817, 746819, 746871, 747340, 747374, 747753, 747790, 748145, 748319, 748526, 748562, 748597, 748657, 749390, 749393, 762581, 763171 1.14.99.63 beta-carotene ketolase, bkt ambiguous -, 718623, 718626, 718690, 719487 1.14.99.63 OBKTM29 mutant enzyme 763171 1.14.99.63 beta-carotene 3-hydroxylase/4-ketolase the enzyme from the yeast Xanthophyllomyces dendrorhous is bifunctional and also catalyses the activity of beta-carotene 3-hydroxylase -, 748658