level of protein O-linked-mannose beta-1,4-N-acetylglucosaminyltransferase 2 in blood serum (OBA_2044560) is the amount of a protein O-linked-mannose beta-1,4-N-acetylglucosaminyltransferase 2 when measured in blood serum. Also known as: blood serum protein O-linked-mannose beta-1,4-N-acetylglucosaminyltransferase 2 amount.