Suicide of lymphoid cells.
D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002469:Cell Separation / Q000379:methods; D002470:Cell Survival; D004912:Erythrocytes / Q000276:immunology; D006736:Horses; D051379:Mice; D008815:Mice, Inbred Strains; D012756:Sheep; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology