The function of HS3ST2 (heparan sulfate-glucosamine 3-sulfotransferase 2, Ensembl gene identifier ENSG00000122254) is as follows. Sulfotransferase that utilizes 3'-phospho-5'-adenylyl sulfate (PAPS) to catalyze the transfer of a sulfo group to an N-unsubstituted glucosamine linked to a 2-O-sulfo iduronic acid unit on heparan sulfate (PubMed:9988768). Catalyzes the O-sulfation of glucosamine in GlcA2S- GlcNS (PubMed:9988768). Unlike HS3ST1/3-OST-1, does not convert non- anticoagulant heparan sulfate to anticoagulant heparan sulfate (PubMed:9988768). .