passages.id: split_1_test_638_passage
passages.type: progene_text
passages.text: Herein we describe the expression cloning of a cDNA encoding a human alpha1,4-N-acetylglucosaminyltransferase ( alpha4GnT ) , a key enzyme for the formation of GlcNAcalpha1 --> 4Galbeta1 --> R .