Over-expression of Arabidopsis thaliana carotenoid hydroxylases individually and in combination with a beta-carotene ketolase provides insight into in vivo functions.

Abstract excerpt

Carotenoids represent a group of widely distributed pigments derived from the general isoprenoid biosynthetic pathway that possess diverse functions in plant primary and secondary metabolism. Modification of alpha- and beta-carotene backbones depends in part on ring hydroxylation. Two ferredoxin-dependent non-heme di-iron monooxygenases (AtB1 and AtB2) that mainly catalyze in vivo beta-carotene hydroxylations of...

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