title: Antigen-reactive T cell clones. II. Unique homozygous and (high responder x low responder)F1 hybrid antigen-presenting determinants detected using poly(Tyr, Glu)-poly D, L-Ala--poly Lys-reactive T cell clones.
abstract: Using murine (T,G)-A--L-reactive T cell clones, we have demonstrated the existence of unique homozygous antigen-presenting determinants expressed on C57bl/6 mice, controlled by the I-A subregion of the murine major histocompatibility complex (MHC), which are not expressed on semisyngeneic (C57Bl/6 x A/J)F1 [(B6A)F1] cells. Additionally, we were able to demonstrate that there exist (T,G)-A--L-reactive clones in F1 mice derived between low responder and high responder parents [(B6A)F1] that recognize antigen in association with transcomplementing hybrid I-A subregion determinants expressed uniquely on (B6A)F1 cells not expressed on cells of either of the parental strains. These data suggest that phenotypic high responsiveness exhibited by (higher responder x low responder)F1 mice was not simply controlled by the high responder parental genome, but was controlled at the phenotypic level of expression of antigen-presenting determinants. Such antigen-presenting determinants can be created by complementation using products of the low responder as well as high responder genome. The significance of the existence of such F1 specific hybrid antigen-presenting determinants for T cell specificity and recognition of self was discussed.
mesh_terms: D000818:Animals; D000941:Antigens; D002478:Cells, Cultured; D002999:Clone Cells / Q000276:immunology; D003433:Crosses, Genetic; D000939:Epitopes; D006720:Homozygote; D006822:Hybrid Cells / Q000276:immunology; D051379:Mice; D008805:Mice, Inbred A; D008810:Mice, Inbred C57BL; D010455:Peptides / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors
chemical_list: D000941:Antigens; D000939:Epitopes; D010455:Peptides; C021759:(T,G)-A-L