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  • Title: Detection of at least two distinct mouse I-E antigen molecules by the use of a monoclonal antibody.
    Author: Ozato K, Sachs DH.
    Journal: J Immunol; 1982 Feb; 128(2):807-10. PubMed ID: 6948041.
    Abstract:
    In an attempt to determine whether the expression of more than a single Ia antigen is determined by the I-E subregion of the mouse major histocompatibility complex (MHC), sequential immunoprecipitation analyses were performed by using a monoclonal antibody and alloantisera reactive with I-E subregion products. 3H-leucine-labeled glycoprotein preparations obtained from H-2d spleen cells were precleared with the monoclonal antibody 14-4-4S and then examined for residual Ia activity precipitable by an alloantiserum detected by SDS-polyacrylamide gel electrophoresis. Residual Ia activity was observed for all three strains of the H-2d haplotype tested. The residual Ia activity could be detected by sera absorbed with B10.A spleen cells, indicating that products of the I-E subregion rather than of the I-C subregion were responsible for this activity. No separable I-Ek molecules were detected in products of B10.A cells with the use of combinations of two monoclonal antibodies (including 14-4-4S) and several appropriate alloantisera. These findings indicate the presence of at least two similar but distinct I-E antigens encoded by the H-2d haplotype.
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