title: Evolution of specific spectra of immunological responsiveness.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000941:Antigens; D005823:Genetics; D006168:Guinea Pigs; D006241:Haptens; D006801:Humans; D005779:Immunodiffusion; D066298:In Vitro Techniques; D051379:Mice; D013045:Species Specificity
chemical_list: D000941:Antigens; D006241:Haptens