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Perforin is expressed mainly in activated cyto-toxic T lymphocytes (CTLs ) and natural killer(NK) cells. The human perforin gene has beencloned. The full length of its cDNA is l668bp, andthe mature HP protein is made up of 534 aminoacid residues with a molecular weight of 66Kd~75Kd. In CTLs and NK cells, perforin is stored incytoplasmic granules and is a major effector of cy-tolysis by these cells. Upon granules releasing,perforin monomers insert into the plasma mem-branes of target ce… 相似文献
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