Reaction catalyzed by N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase (3.1.4.45)

		+		H2O	=			+
	glycoprotein N-acetyl-D-glucosaminyl-phospho-D-mannose	+		H2O	=		N-acetyl-D-glucosamine	+		glycoprotein phospho-D-mannose