title: Cellular origins and targets of costimulator (IL2).
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D003602:Cytotoxicity, Immunologic; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D007376:Interleukin-2 / Q000032:analysis / Q000302:isolation & purification / Q000494:pharmacology*; D008211:Lymphocyte Cooperation; D008222:Lymphokines / Q000032:analysis / Q000302:isolation & purification / Q000494:pharmacology*; D008264:Macrophages / Q000276:immunology; D051379:Mice; D008808:Mice, Inbred CBA; D008954:Models, Biological; D008970:Molecular Weight; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000949:Histocompatibility Antigens Class II; D007376:Interleukin-2; D008222:Lymphokines