Cloning and Characterization of a Flavonol Synthase Gene from Scutellaria baicalensis

Figure 1

Flavonol biosynthesis in plants (redrawn from [37]). The red letter and black box indicate the enzyme and compound analyzed in this study. PAL, phenylalanine ammonia lyase; C4H, cinnamate 4-hydroxylase; 4CL, 4-coumaroyl CoA ligase; CHS, chalcone synthase; CHI, chalcone isomerase; F3H, flavone 3-hydroxylase; F3′H, flavonoid 3′-hydroxylase; F3′5′H, flavonoid 3′5′-hydroxylase; FLS, flavonol synthase.