title: A three-site-interaction model for antigen specificity, MHC restriction, and Ir-gene control in lymphocyte communication.
mesh_terms: D002450:Cell Communication; D000939:Epitopes; D005802:Genes, MHC Class II; D006801:Humans; D008214:Lymphocytes / Q000502:physiology*; D008285:Major Histocompatibility Complex; D008954:Models, Biological; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000502:physiology
chemical_list: D000939:Epitopes; D011948:Receptors, Antigen, T-Cell