Reaction catalyzed by glycogen(starch) synthase (2.4.1.11), NDP-glucose-starch glucosyltransferase (2.4.1.242)

		+			=			+
	dTDP-glucose	+		(1,4-alpha-D-glucosyl)n	=		dTDP	+		(1,4-alpha-D-glucosyl)n+1