Reaction catalyzed by nucleoside phosphotransferase (2.7.1.77)

		+			=			+
	4-nitrophenyl phosphate	+		1-(beta-D-ribofuranosyl)-4(1H)pyridone	=		4-nitrophenol	+		1-(beta-D-ribofuranosyl)-4(1H)pyridone 5'-phosphate