OBA_2040755 (level of beta-1,4 N-acetylgalactosaminyltransferase 1 in blood serum) is the amount of a beta-1,4 N-acetylgalactosaminyltransferase 1 when measured in blood serum. Also known as: blood serum beta-1,4 N-acetylgalactosaminyltransferase 1 amount.