Reaction catalyzed by tRNA dimethylallyltransferase (2.5.1.75)

		+		adenine37 in tRNA	=			+		N6-dimethylallyladenine37 in tRNA
	dimethylallyl diphosphate	+		adenine37 in tRNA	=		diphosphate	+		N6-dimethylallyladenine37 in tRNA