label: alpha-D-glucosaminyl-[heparan sulfate](n) + 3'-phosphoadenylyl sulfate <=> 6-sulfo-alpha-D-glucosaminyl-[heparan sulfate](n) + adenosine 3',5'-bisphosphate + H(+)
label_lc: alpha-d-glucosaminyl-[heparan sulfate](n) + 3'-phosphoadenylyl sulfate <=> 6-sulfo-alpha-d-glucosaminyl-[heparan sulfate](n) + adenosine 3',5'-bisphosphate + h(+)