2.4.1.206 lactosylceramide 1,3-N-acetyl-beta-D-glucosaminyltransferase; LA2 synthase; beta1->3-N-acetylglucosaminyltransferase; uridine diphosphoacetylglucosamine-lactosylceramide beta-acetylglucosaminyltransferase; lactosylceramide beta-acetylglucosaminyltra • • •