. "\"Catalysis of the reaction: dimethylallyl diphosphate + tRNA = diphosphate + tRNA containing 6-dimethylallyladenosine.\" [EC:2.5.1.75]" . . "tRNA dimethylallyltransferase activity" . "dimethylallyl-diphosphate:tRNA dimethylallyltransferase activity" . "EC:2.5.1.75" . "MetaCyc:RXN0-6274" . "Note that this activity was formerly know in GO and EC as 'tRNA isopentenyltransferase' (EC 2.5.1.8, GO:0004811), but it is now known that dimethylallyl diphosphate, rather than isopentenyl diphosphate, is the substrate." . . "tRNA isopentenyltransferase activity" . "tRNA prenyltransferase activity" .