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