Reaction catalyzed by N-acetyllactosaminide beta-1,3-N-acetylglucosaminyltransferase (2.4.1.149)

		+			=			+
	UDP-N-acetyl-D-glucosamine	+		GalNAcbeta(1-4)GlcNAcbeta1-OR	=		UDP	+		GlcNAcbeta(1-3)GalNAcbeta(1-4)GlcNAcbeta1-OR