title: T cell receptors with allo-major histocompatibility complex specificity from rat and mouse. Similarity of size, plasmin susceptibility, and localization of antigen-binding region.
abstract: Antisera specific for the constant part Ctau of T cell receptor molecules in mice and rats have been produced in rabbits by immunization with idiotype-positive rat T cell molecules. Such antisera could be shown to react with the majority of normal T lymphocytes from both rats and mice. Mixed leukocyte culture-activated T blasts displayed a higher percentage of positive cells than concanovalin A- or phytohemaglutinin-induced T blasts. Lipopolysaccharide-induced B blasts were not reactive with the antiserum. Lyt-1-,2+,3+ blasts displayed a significantly brighter straining than the corresponding Lyt-1+,2-,3- blasts. Isolation of the reactive molecules from T cells by immunosorption yielded a 70,000-dalton single chain polypeptide as the dominant group of molecules. Plasmin caused the chain to split into 45,000- and 25,000-dalton polypeptides, with the smaller fragment displaying antigen-binding capacity. Molecules identical in size and plasma degradation patterns were isolated from Lyt-1+,2-3- and 1-,2+,3+ blasts. Preliminary functional data supported the view that the antiserum is directed against the constant region Ctau relevant receptor structures on immunocompetent T lymphocytes.
mesh_terms: D000818:Animals; D000939:Epitopes; D005341:Fibrinolysin / Q000494:pharmacology; D005455:Fluorescent Antibody Technique; D007106:Immune Sera / Q000494:pharmacology; D007519:Isoantigens / Q000235:genetics*; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D008285:Major Histocompatibility Complex; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D011817:Rabbits; D051381:Rats; D011914:Rats, Inbred BN; D011917:Rats, Inbred Lew; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D013205:Staphylococcal Protein A; D013601:T-Lymphocytes / Q000145:classification
chemical_list: D000939:Epitopes; D007106:Immune Sera; D007519:Isoantigens; D011948:Receptors, Antigen, T-Cell; D013205:Staphylococcal Protein A; D005341:Fibrinolysin