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  • Title: Determination of the range in binding-site densities of rat skin heparin chains with high binding affinities for antithrombin.
    Author: Horner AA, Kusche M, Lindahl U, Peterson CB.
    Journal: Biochem J; 1988 Apr 01; 251(1):141-5. PubMed ID: 3390150.
    Abstract:
    Rat skin heparin proteoglycans vary markedly in the proportions of their constituent polysaccharide chains that have high binding affinity for antithrombin. As the proportion of such chains in a proteoglycan rises, their degree of affinity for antithrombin also increases [Horner (1987) Biochem. J. 244, 693-698]. The antithrombin-binding-site densities of such chains have now been determined, by measuring heparin-induced enhancement of the intrinsic fluorescence of antithrombin and by chemical analysis for the disaccharide sequence glucuronosyl-N-sulphoglucosaminyl (3,6-di-O-sulphate), which is unique to this site in heparin [Lindahl, Bäckström, Thunberg & Leder (1980) Proc. Natl. Acad. Sci. U.S.A. 77, 6551-6555]. Antithrombin-binding-site density ranged from one to five sites per chain.
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