Carotene epsilon-monooxygenase, chloroplastic
UniProtKB accession: Q6TBX7
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Go to UniProtKB: Q6TBX7
UniProtKB description: Heme-containing cytochrome P450 involved in the biosynthesis of xanthophylls. Specific for epsilon- and beta-ring hydroxylation of alpha-carotene. Has only a low activity toward the beta-rings of beta-carotene. The preferred substrate in planta is not alpha-carotene but the epsilon-ring of zeinoxanthin (PubMed:12782726, PubMed:16890225, PubMed:19147649, PubMed:19939422). Possesses a major beta-carotene hydroxylase activity in planta when depleted in its preferred substrate alpha-carotene (PubMed:22513258).
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