an N-acetyl-beta-D-glucosaminyl derivative + UDP-N-acetyl-alpha-D-galactosamine = an N-acetyl-beta-D-galactosaminyl-(1->4)-N-acetyl-beta-D-glucosaminyl derivative + UDP + H(+)
an n-acetyl-beta-d-glucosaminyl derivative + udp-n-acetyl-alpha-d-galactosamine = an n-acetyl-beta-d-galactosaminyl-(1->4)-n-acetyl-beta-d-glucosaminyl derivative + udp + h(+)
an N-acetyl-beta-D-glucosaminyl derivative + UDP-N-acetyl-alpha-D-galactosamine = an N-acetyl-beta-D-galactosaminyl-(1->4)-N-acetyl-beta-D-glucosaminyl derivative + UDP + H(+)
an n-acetyl-beta-d-glucosaminyl derivative + udp-n-acetyl-alpha-d-galactosamine = an n-acetyl-beta-d-galactosaminyl-(1->4)-n-acetyl-beta-d-glucosaminyl derivative + udp + h(+)