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Enzyme linked immunosorbent assay for measuring antithrombin III.
  1. P Edgar,
  2. I Jennings,
  3. P Harper
  1. Department of Haematology, Addenbrooke's Hospital, Cambridge.


    A competitive ELISA for the measurement of antithrombin III antigen was developed using a pure preparation of antithrombin. This two step immunoassay requires only one antibody binding step and avoids the binding of anti-antithrombin antibody to the solid phase. Plasma samples measured by this ELISA correlated well with measurements taken with immune electrophoresis measurements (r = 0.933); the ELISA was also shown to be both sensitive and precise.

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