2.4.1.41 polypeptide N-acetylgalactosaminyltransferase BW-5147 cell 2.4.1.155 alpha-1,6-mannosyl-glycoprotein 6-beta-N-acetylglucosaminyltransferase BW-5147 cell 3.2.1.207 mannosyl-oligosaccharide alpha-1,3-glucosidase BW-5147 cell