Reaction catalyzed by N,N'-diacetylchitobiose phosphorylase (2.4.1.280)

		+			=			+
	4-nitrophenyl N,N'-diacetylchitobioside	+		phosphate	=		N-acetyl-alpha-D-glucosamine 1-phosphate	+		4-nitrophenyl N-acetyl-D-glucosaminide