title: Highly active heparin species with multiple binding sites for antithrombin.
mesh_terms: D000818:Animals; D000991:Antithrombins / Q000378:metabolism*; D001665:Binding Sites; D006493:Heparin / Q000378:metabolism*; D006801:Humans; D008970:Molecular Weight; D011485:Protein Binding; D013329:Structure-Activity Relationship; D013552:Swine
chemical_list: D000991:Antithrombins; D006493:Heparin