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  • Title: Methods for semi micro or automated determination of thrombin, antithrombin, and heparin cofactor using he substrate, H-D-Phe-Pip-Arg-p-nitroanilide-2HCl.
    Author: Scully MF, Kakkar VV.
    Journal: Clin Chim Acta; 1977 Sep 15; 79(3):595-602. PubMed ID: 70286.
    Abstract:
    Methods for the measurement of thrombin and plasma antithrombin, by end point determination at a semi micro level and also by rate assay measurement in a fully automated system have been devised using the thrombin specific chromogenic substrate, H-D-Phe-Pip-Arg-p-nitroanilide. Preliminary defibrination of plasma is avoided in both methods. The semi micro method has been correlated with antitrhombin measured in plasma of postoperative patients by established clotting and immunological assays. The automated method has been found to be highly reproducible and to have less scatter than the other procedures.
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