Abstract
A sensitive, simple and reproducible biotin-avidin amplified double antibody immunoassay to quantitate low concentrations of mouse immunoglobulins is described. The assay is a useful technique to measure trace levels of murine monoclonal antibodies in culture supernatants of hybridoma cells metabolically labeled with radioactive isotopes. A combination of radioactive counting and measurement of the absorbance of a peroxidase catalyzed reaction permits accurate determination of the specific radioactivity of labeled monoclonal antibodies.
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