heparin defined in 1951 yearheparin - heparin;
heparin - Substance which prevents blood clotting by stopping conversion of prothrombin to thrombin and by neutralizing thrombin. Extractable from various tissues, especially lung. Probably contained in mast cells, which occur in connective tissue. Sulphur-containing complex polysaccharide.
near heparin in Knolik
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