di-trans,octa-cis-undecaprenyl phosphate + UDP-N-acetyl-alpha-D-glucosamine = N-acetyl-alpha-D-glucosaminyl-di-trans,octa-cis-undecaprenyl diphosphate + UMP
di-trans,octa-cis-undecaprenyl phosphate + udp-n-acetyl-alpha-d-glucosamine = n-acetyl-alpha-d-glucosaminyl-di-trans,octa-cis-undecaprenyl diphosphate + ump