title: The E-T (elephant-tadpole) paradox necessitates the concept of a unit of B-cell function: the protection.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000937:Antigen-Antibody Reactions; D001402:B-Lymphocytes / Q000276:immunology*; D001666:Binding Sites, Antibody / Q000235:genetics; D005075:Biological Evolution; D004247:DNA / Q000276:immunology; D006239:Haplotypes; D006801:Humans; D007958:Leukocyte Count; D008954:Models, Biological; D011947:Receptors, Antigen, B-Cell / Q000276:immunology
chemical_list: D011947:Receptors, Antigen, B-Cell; D004247:DNA