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Tyr residue-specific enzyme modifications. Reactions of F-prenyltransferases, enzymatic cascade of tyrsoniase/catechol-O-methyltransferase (COMT) and glycosyltransferases (GT), GtfE. i) nonnative groups installed by COMT on the tyrosinase-introduced hydroxy group, ii) nonnative sugars accepted by GtfE.
