PerforinPore Forming Cytotoxic ProteinsGranzymesMembrane GlycoproteinsCytotoxicity, ImmunologicT-Lymphocytes, CytotoxicHistiocytosis, Non-Langerhans-CellKiller Cells, NaturalFas Ligand ProteinCD8-Positive T-LymphocytesSerine EndopeptidasesLymphohistiocytosis, HemophagocyticAntigens, CD95Cytotoxicity Tests, ImmunologicMice, Inbred C57BLCytoplasmic GranulesInterferon-gammaMetrial GlandMice, KnockoutLymphocyte ActivationT-Lymphocyte SubsetsCD4-Positive T-LymphocytesLysosomal-Associated Membrane Protein 1Antigens, CD56Flow CytometryCell Degranulation