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  • Title: Inhibitor-neutralisation assay and electro-immuno assay of human factor IX (Christmas factor).
    Author: Bertina RM, van der Linden IK.
    Journal: Clin Chim Acta; 1977 Jun 15; 77(3):275-86. PubMed ID: 559555.
    Abstract:
    A rabbit antibody specifically precipitating human factor IX has been used in the assay of factor IX antigen. The results obtained with two different methods (inhibitor-neutralisation assay and electro-immunoassay) have been compared in a group of healthy individuals and in a group of hemophilia B patients and carriers. In general, identical results are obtained with both methods, except in some hemophilia B+ carriers and patients, where the electroimmuno assay gives 1.5-2.0 times higher levels. Results obtained by electroimmuno assay are more accurate and reproducible than those obtained by inhibitor-neutralisation assay, which is of importance for its potential use in carrier detection.
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