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Flavonoid biosynthesis pathway in the tea plant. PAL, phenylalanine ammonia lyase; C4H: cinnamate 4-hydroxylase; 4CL: 4-coumarate-CoA ligase; CHS, chalcone synthase; CHI, chalcone isomerase; F3H, flavanone 3-hydroxylase; DFR, dihydroflavonol 4-reductase; ANR, anthocyanidin reductase; F3′5′H, flavonoid-3′5′-hydroxylase; F3’H, flavonoid 3′-hydroxylase; FLS, flavonol synthase; LAR, leucoanthocyanidin reductase.
