Reaction catalyzed by [histone H3]-lysine4 N-trimethyltransferase (2.1.1.354)

		+		histone H3(K4)	=			+		N-methylated histone H3(K4)
	S-adenosyl-L-methionine	+		histone H3(K4)	=		S-adenosyl-L-homocysteine	+		N-methylated histone H3(K4)