label: 3-O-[N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + UDP-alpha-D-galactose = O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + UDP + H(+)
label_lc: 3-o-[n-acetyl-alpha-d-galactosaminyl]-l-threonyl-[protein] + udp-alpha-d-galactose = o(3)-[beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-galactosaminyl]-l-threonyl-[protein] + udp + h(+)