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

		+			=			+
	alpha-methyl-D-glucoside	+		2,6-dichlorophenolindophenol	=		methyl 3-dehydro-alpha-D-glucoside	+		reduced 2,6-dichlorophenolindophenol