Thromb Haemost 1982; 48(01): 084-086
DOI: 10.1055/s-0038-1657222
Original Article
Schattauer GmbH Stuttgart

On the Reliability of the Use of Heparin Immobilized on Agarose for the Study of the Interactions among Heparin, Thrombin and Antithrombin

Wayne W Fish
The Dept. of Biochemistry, Medical University of South Carolina, Charleston, South Carolina, U.S.A. and the Dept. of Medical and Physiological Chemistry, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Biomedical Center, Uppsala, Sweden
,
Ingemar Björk
The Dept. of Biochemistry, Medical University of South Carolina, Charleston, South Carolina, U.S.A. and the Dept. of Medical and Physiological Chemistry, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Biomedical Center, Uppsala, Sweden
› Author Affiliations
Further Information

Publication History

Received 10 February 1982

Accepted 15 June 1982

Publication Date:
13 July 2018 (online)

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Summary

The extent of inhibition of thrombin was re-examined as a consequence of the sequence of addition of thrombin and antithrombin III to a column of heparin immobilized on agarose. With the use of pure enzyme, pure inhibitor, and a highly sensitive chromogenic substrate, no appreciable difference in the extent of thrombin inhibition was observed between the two sequences of addition. These observations, together with a demonstrated sensitivity of the method to variations in experimental protocol, challenge the conclusions reached in an earlier work (Hatton and Regoeczi, Thromb. Res. 1977; 10:645) which utilized this experimental approach but which employed larger quantities of reactants and a less sensitive substrate.