S. Chooklin, B. Pidhirnyy, S. Chuklin Lviv Regional Clinical Hospital Introduction. Heparin is a glycosaminoglycan composed of chains of alternating d-glucosamine and uronic acid residues. Its major anticoagulant effect is attributed to a unique pentasaccharide structure. Heparin prevents coagulation after binding with a plasma antithrombin III. Antithrombin III is a protease inhibitor and complex heparin Read More …