title: Evolution in microcosm: the rapid somatic diversification of lymphocytes.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000918:Antibody Specificity; D005075:Biological Evolution; D005333:Fetus / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007108:Immune Tolerance; D007448:Invertebrates; D008214:Lymphocytes / Q000276:immunology*; D010641:Phenotype; D014714:Vertebrates