heparan sulfate 6-sulfotransferase activity https://github.com/geneontology/go-ontology/issues/24749 https://github.com/geneontology/go-ontology/issues/28380 https://github.com/geneontology/go-ontology/issues/28762 RHEA:56604 Reactome:R-HSA-2076419 heparan sulphate 6-O-sulphotransferase activity Catalysis of the reaction: alpha-D-glucosaminyl-[heparan sulfate](n) + 3'-phosphoadenylyl sulfate = 6-sulfo-alpha-D-glucosaminyl-[heparan sulfate](n) + adenosine 3',5'-bisphosphate + H+. GO:0017095 molecular_function heparan sulfate 6-O-sulfotransferase activity heparin 6-O-sulfotransferase activity heparan sulfate sulfotransferase activity