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A schematic presentation of the flavonoid biosynthetic pathway. Enzyme abbreviations not defined in the text are as follows: PAL, Phe ammonia-lyase; C4H, cinnamate 4-hydroxylase; 4CL, 4-coumaroyl:CoA ligase; CHI, chalcone isomerase; F3H, flavanone 3-hydroxylase; UFGT, UDP Glc-flavonoid 3-O-glucosyl transferase; RT, rhamnosyl transferase.
