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Key hydroxylases that participate in hydroxylation decoration during flavonoid biosynthesis. F3H, flavanone 3-hydroxylase; F3′H, flavonoid 3′-hydroxylase; F3′5′H, flavonoid 3′,5′-hydroxylase; F6H, flavone 6-hydroxylase; F8H, flavone 8-hydroxylase; DFR, dihydroflavonol 4-reductase; ANS, anthocyanidin synthase; ANR, anthocyanidin reductase; LAR, leucoanthocyanidin reductase.
