Natural killer cells.
D000375:Aging; D000818:Animals; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D004777:Environment; D006183:H-2 Antigens / Q000235:genetics; D007372:Interferons / Q000494:pharmacology; D007694:Killer Cells, Natural / Q000166:cytology / Q000276:immunology* / Q000648:ultrastructure; D051379:Mice; D010802:Phylogeny; D051381:Rats; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
D006183:H-2 Antigens; D007372:Interferons