Reaction catalyzed by tRNA (guanine6-N2)-methyltransferase (2.1.1.256)

		+		guanine37 in tRNATrp	=			+		N2-methylguanine37 in tRNATrp
	S-adenosyl-L-methionine	+		guanine37 in tRNATrp	=		S-adenosyl-L-homocysteine	+		N2-methylguanine37 in tRNATrp