1SR5:
reference: The ternary complex of antithrombin-anhydrothrombin-heparin reveals the basis of inhibitor specificity., Dementiev A, Petitou M, Herbert JM, Gettins PG, Nat Struct Mol Biol 2004 Sep;11(9):863-7. Epub 2004 Aug 15. PMID: 15311268

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