Reaction catalyzed by glucose 1-dehydrogenase (PQQ, quinone) (1.1.5.2), soluble quinoprotein glucose dehydrogenase (1.1.99.35)

		+			=			+
	D-xylose	+		oxidized N-methylphenazonium methyl sulfate	=		D-xylono-1,5-lactone	+		reduced N-methylphenazonium methyl sulfate