Reaction catalyzed by anthocyanidin 3-O-glucoside 2''-O-glucosyltransferase (2.4.1.297)

		+			=			+
	UDP-alpha-D-glucose	+		an anthocyanidin 3-O-beta-D-glucoside	=		UDP	+		an anthocyanidin 3-O-sophoroside