label: 3-O-{beta-D-galactosyl-(1->3)-[N-acetyl-beta-D-glucosaminyl-(1->6)]-N-acetyl-alpha-D-galactosaminyl}-L-threonyl-[protein] + UDP-N-acetyl-alpha-D-glucosamine = 3-O-{beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->3)-[beta-D-GlcNAc-(1->6)]-alpha-D-GalNAc}-L-threonyl-[protein] + UDP + H(+)
label_lc: 3-o-{beta-d-galactosyl-(1->3)-[n-acetyl-beta-d-glucosaminyl-(1->6)]-n-acetyl-alpha-d-galactosaminyl}-l-threonyl-[protein] + udp-n-acetyl-alpha-d-glucosamine = 3-o-{beta-d-glcnac-(1->3)-beta-d-gal-(1->3)-[beta-d-glcnac-(1->6)]-alpha-d-galnac}-l-threonyl-[protein] + udp + h(+)