title: The third cell type required for the immune response of spleen cells in vitro.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000941:Antigens; D002448:Cell Adhesion; D046508:Culture Techniques; D004912:Erythrocytes / Q000276:immunology*; D005260:Female; D006462:Hemolytic Plaque Technique; D007114:Immunization; D008214:Lymphocytes / Q000276:immunology / Q000528:radiation effects; D051379:Mice; D011830:Radiation Effects; D012756:Sheep; D013154:Spleen / Q000166:cytology / Q000276:immunology*
chemical_list: D000941:Antigens