increased protein level abnormal UDP-N-acetylglucosamine-1-phosphotransferase level increased UDP-N-acetylglucosamine-1-phosphotransferase level increased GlcNAc-phosphotransferase level increased level of the enzyme that catalyzes the chemical reaction: UDP-N-acetyl-D-glucosamine + lysosomal-enzyme D-mannose to UMP + lysosomal-enzyme N-acetyl-D-glucosaminyl-phospho-D-mannose MP:0020299