label: alpha-D-glucosaminyl-[heparan sulfate](n) + 3'-phosphoadenylyl sulfate <=> N-sulfo-alpha-D-glucosaminyl-[heparan sulfate](n) + adenosine 3',5'-bisphosphate + 2 H(+)
label_lc: alpha-d-glucosaminyl-[heparan sulfate](n) + 3'-phosphoadenylyl sulfate <=> n-sulfo-alpha-d-glucosaminyl-[heparan sulfate](n) + adenosine 3',5'-bisphosphate + 2 h(+)