Reaction catalyzed by fructose 5-dehydrogenase (1.1.5.14)

		+			=			+
	D-fructose	+		2,3-dimethoxy-5-farnesyl-1,4-benzoquinone	=		5-dehydro-D-fructose	+		2,3-dimethoxy-5-farnesyl-1,4-benzoquinol