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Abstract
A simple ELISA assay for detecting murine anti-SRBC antibodies of IgG class was developed and the variation of the results according to different experimental conditions was investigated. Erythrocytes were left to settle in flexible plastic microtiter plates, after which they were fixed with glutaraldehyde and the remaining binding sites in the plates saturated with ovalbumin. Serum or monoclonal IgG antibodies were then allowed to react with the erythrocytes. Protein A coupled to alkaline phosphatase caused a color change in the subsequently added enzyme substrate. The results proved to be of good reproducibility. specificity and sensitivity. The assay can be used for measuring IgG concentration, estimating antibody avidity and number of antigenic determinants on the SRBC, as well as screening IgG anti-SRBC hybridomas. The precision of concentration estimates was very good when standard curves were used.
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