title: Rat kappa chain allotypes. IV. Monoclonal antibodies to distinct RI-1b specificities.
abstract: Four hybridomas are described which produce antibodies to the RI-1b rat kappa chain allotype. Three are rat alloantibodies of KG2b isotype, one is a mouse heteroantibody of KG2a isotype. These antibodies were labeled by incorporation of 75Se-selenomethionine and their specificity determined by a plate-binding assay. Inhibition studies using partially cross-reactive sera from Asian and Australian Rattus show that these four hybridomas detect four distinct RI-1b specificities. Differences in the slopes of the inhibition curves indicate that each of the specificities may exist in more than one form. In addition, in the form of 125I-labeled antibodies, two of these hybridomas show a high degree of specificity in binding to Ig-bearing lymphocytes from spleen and lymph nodes. These hybridomas will therefore be useful not only in studies on the phylogenetic distribution of RI-1 specificities but also in replacing conventional antisera for immunochemical and cellular immunological studies.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000918:Antibody Specificity; D003429:Cross Reactions; D000939:Epitopes / Q000276:immunology; D006825:Hybridomas; D007126:Immunoglobulin Allotypes / Q000276:immunology*; D007147:Immunoglobulin Light Chains / Q000276:immunology*; D007145:Immunoglobulin kappa-Chains / Q000276:immunology*; D008198:Lymph Nodes / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D051379:Mice; D051381:Rats; D011917:Rats, Inbred Lew; D011919:Rats, Inbred Strains; D013154:Spleen / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D007126:Immunoglobulin Allotypes; D007147:Immunoglobulin Light Chains; D007145:Immunoglobulin kappa-Chains