a 3-O-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + 3'-phosphoadenylyl sulfate <=> a 3-O-[3'-O-sulfo-beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + adenosine 3',5'-bisphosphate + H(+)
a 3-o-[beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-galactosaminyl]-l-threonyl-[protein] + 3'-phosphoadenylyl sulfate <=> a 3-o-[3'-o-sulfo-beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-galactosaminyl]-l-threonyl-[protein] + adenosine 3',5'-bisphosphate + h(+)
a 3-O-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + 3'-phosphoadenylyl sulfate <=> a 3-O-[3'-O-sulfo-beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + adenosine 3',5'-bisphosphate + H(+)
a 3-o-[beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-galactosaminyl]-l-threonyl-[protein] + 3'-phosphoadenylyl sulfate <=> a 3-o-[3'-o-sulfo-beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-galactosaminyl]-l-threonyl-[protein] + adenosine 3',5'-bisphosphate + h(+)