Figure 1. The anthocyanin biosynthetic pathway PAL: Phenylalanine ammonialyase; C4H: Cinnamate 4-hydroxylase; 4CL: 4-coumaroyl-CoA ligase; CHS: Chalcone syn-thase; CHI: Chalcone isomerase; F3H: Flavanone 3-hydroxylase; F3′H: Flavonoid 3′-hydroxylase; F3′,5′H: Flavonoid 3′,5′-hydroxylase; DFR: Dihydroflavonol reductase; ANS: Anthocyanin synthase; GT: Glycosyltransferases; AT: Acyltransfer-ases; MT: Methyltransferase; AN9: Anthocyanin 9
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