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

		+			=			+
	N-p-nitrophenylvalidamine	+		2,6-dichlorophenolindophenol	=		N-p-nitrophenyl-3-ketovalidamine	+		reduced 2,6-dichlorophenolindophenol