Abstract
A monoclonal antibody (MAb), designated H3, with specificity for hamster lymphocytes, was produced by somatic cell hybridization of myeloma Sp 2/0 and spleen cells of Balb/c mice immunized with suspensions of viable hamster thymocytes.The H3 MAb (IgG 3) reacted specifically with hamster thymocyte surface membranes (immunofluorescent assay). The antibody recognized a protein of an approximate molecular weight of 44,000 Daltons in immunoblots of hamster thymocyte extracts. The soluble H3 MAb presented potent mitogenic properties as indicated by the DNA synthesis induced in
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