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Biosynthetic pathway for (2S)-hesperetin production in E. coli. TAL, tyrosine ammonia lyase; 4CL, 4-coumarate CoA ligase; CHS, chalcone synthase; CHI, chalcone isomerase; F3′H, flavonoid 3′-hydroxylase; CPR, cytochrome P450 reductase; F4′OMT, flavonoid 4′-O-methyltransferase.
