an N-acetyl-alpha-D-glucosaminyl derivative + UDP-alpha-D-galactose <=> a beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-glucosaminyl derivative + UDP + H(+)
an n-acetyl-alpha-d-glucosaminyl derivative + udp-alpha-d-galactose <=> a beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-glucosaminyl derivative + udp + h(+)