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Reaction diagram of the galloylated catechin biosynthetic pathway. In the first reaction (I), the galloylated acyl donor βG was biosynthesized by UGGT from the substrates GA and UDPG. In the second reaction (II), galloylated catechins ECG or EGCG were produced by ECGT from the substrates βG and nongalloylated catechins EC or EGC.
