Specificity
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The reactivity of the antiserum is restricted to a subclass specific determinant on the C H 2 domain of IgA1 as tested in haemagglutination, haemagglutination inhibition, direct binding enzyme immunoassay, competitive inhibition enzyme immunoassay, immunoblotting, immunoprecipitation, latex agglutination assay and histochemistry (Results of an IUIS/WHO collaborative study, Mestecky J. et al. (1996) J. Immunol. Methods 193, 103-148). Biotin-conjugated purified monoclonal mouse antibody to human IgA1, subclass specific
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