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Schematic representation of the reactions catalyzed by trans-prenyltransferases and cis-prenyltransferases showing the stereochemistry of the double bond formed in the enzyme product. DMAPP, dimethylallyl diphosphate; IPP, isopentenyl diphosphate; PT, prenyltransferase; GPP, geranyl diphosphate; FPP, farnesyl diphosphate; GGPP, geranylgeranyl diphosphate; GFPP, geranylfarnesyl diphosphate; and OPP, diphosphate ester.
