Reaction catalyzed by 4-alpha-glucanotransferase (2.4.1.25)

		+			=		oligosaccharides terminated by 4-O-alpha-D-glucopyranosyl-N-acetyl-D-glucosamine
	starch	+		N-acetyl-D-glucosamine	=		oligosaccharides terminated by 4-O-alpha-D-glucopyranosyl-N-acetyl-D-glucosamine