2.4.1.41 polypeptide N-acetylgalactosaminyltransferase HMT-3522 cell moderate signal 684219 2.4.1.41 polypeptide N-acetylgalactosaminyltransferase HMT-3522 cell very weak signal, nearly undetectable 684219 2.4.1.41 polypeptide N-acetylgalactosaminyltransferase HMT-3522 cell weak signal 684219