Abstract

Monoclonal antibodies specific for sheep IgG subclasses IgG 1 or IgG 2 were produced using conventional cell fusion techniques. Monoclonal antibodies detected by preliminary screening assays were further characterized and their specificity verified by titration of ascites in radioimmunoassay or passive haemagglutination using pure sheep IgG 1 or IgG 2. Further evidence for the subclass specificity of the antibodies was obtained from immunoelectrophoretograms of sheep serum or purified proteins developed with monoclonal antibodies. Reaction of monoclonal antibodies with various IgG fragments showed that the determinants recognised were located on the pFc′ portion of the heavy chain.

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