Antithrombin III (AT III) is a single chain glycoprotein of molecular mass 58 kDa with four glycosylation sites and three intra-molecular disulfide bonds. AT III is normally present in human plasma at a concentration of approx. 12.5 mg/dl. It is the major inhibitor of thrombin. Inactivation of thrombin by AT-III occurs by formation of a covalent bond resulting in an inactive 1:1 stoichiometric complex between the two components.
Antithrombin-III; ATIII; serine (or cysteine) proteinase inhibitor, clade C (antithrombin), member 1; Serpin C1; serpin peptidase inhibitor clade C member 1; serpin peptidase inhibitor, clade C (antithrombin), member 1
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