Reaction catalyzed by glucoside 3-dehydrogenase (acceptor) (1.1.99.13)

		+			=			+
	isomaltose	+		2,6-dichlorophenolindophenol	=		6-O-alpha-D-xylo-hexopyranosyl-4-ulose-alpha-D-glucopyranose	+		reduced 2,6-dichlorophenolindophenol