The antigen receptor problem.
D000818:Animals; D000906:Antibodies; D000917:Antibody Formation; D000918:Antibody Specificity; D000921:Antibody-Producing Cells; D000937:Antigen-Antibody Reactions; D000941:Antigens; D001665:Binding Sites; D001853:Bone Marrow / Q000502:physiology; D055598:Chemical Phenomena; D002621:Chemistry; D000939:Epitopes; D006801:Humans; D007109:Immunity; D007136:Immunoglobulins; D008264:Macrophages; D013950:Thymus Gland / Q000502:physiology; D005719:gamma-Globulins / Q000032:analysis
D000906:Antibodies; D000941:Antigens; D000939:Epitopes; D007136:Immunoglobulins; D005719:gamma-Globulins