A specialized secretory lysosome that is present in cells with cytolytic capability such as cytotoxic T lymphocytes and natural killer cells. Cytolytic granules mediate the storage and regulated excretion of lytic molecules for killing of target cells. [GOC:jl, PMID:11052265, PMID:12766758]
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C5: Ontology GO: Gene Ontology GO:CC: GO Cellular Component