Killer T Cell



(1) A type of T cell that does not express markers of either T or B-cell lineage, but may possess fc receptors for immunoglobulin g. It functions by killing target cell through antibody-dependent cell-mediated cytotoxicity or through perforin, killing cells without prior sensitization (hence, the name).

(2) Mammalian cell that is capable of lysing antibody-coated target cell.


This type of cell attacks tumor cells and infected cells by releasing chemicals that are toxic to the cell, resulting to cell death of the target cell.


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