title: The mouse T cell receptor: structural heterogeneity of molecules of normal T cells defined by xenoantiserum.
abstract: We have previously demonstrated that T lymphomas may express clonally specific epitopes that are carried by a T-cell-restricted, disulfide-bonded heterodimeric glycoprotein. We have used a monoclonal antibody, 124-40, to isolate the lymphoma-specific antigen and raise a xenoantiserum to the molecule. This antiserum immunoprecipitates a family of disulfide-bonded dimers from normal thymocytes and T cells, but is unreactive with B cells. Peptide maps prepared after limited proteolytic digestion indicate that the molecules from the different cell populations have homologous primary structures. Comparison of two-dimensional tryptic peptide maps indicate that, in addition to several common peptides, the molecules exhibit considerable structural heterogeneity. Taken together, these data indicate that the T-cell-specific heteroduplex has regions of constant and variable structure consistent with the properties expected for the T cell antigen receptor.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D004220:Disulfides / Q000276:immunology*; D000939:Epitopes / Q000032:analysis; D007106:Immune Sera / Q000276:immunology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D011817:Rabbits; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D014357:Trypsin / Q000378:metabolism
chemical_list: D000911:Antibodies, Monoclonal; D004220:Disulfides; D000939:Epitopes; D007106:Immune Sera; D011948:Receptors, Antigen, T-Cell; D014357:Trypsin