N-acetylglucosaminyldiphosphodolichol N-acetylglucosaminyltransferase; UDP-GlcNAc:dolichyl-pyrophosphoryl-GlcNAc GlcNAc transferase; uridine diphosphoacetylglucosamine-dolichylacetylglucosamine pyrophosphate acetylglucosaminyltransferase; N,N'-diace • • •