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    wha is perforin

    0  Views: 544 Answers: 2 Posted: 10 years ago

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    Perforin is a cytolytic protein found in the granules of Cytotoxic T lymphocytes (CTLs) and NK cells


    Read more >http://en.wikipedia.org/wiki/Perforin 

    According to WIKIPEDIA:


    Perforin is a cytolytic protein found in the granules of Cytotoxic T lymphocytes (CTLs) and NK cells. Upon degranulation, perforin inserts itself into the target cell's plasma membrane, forming a pore. The lytic membrane-inserting part of perforin is the MACPF domain.[5] This region shares homology with cholesterol-dependent cytolysins from Gram-positive bacteria.[1]


    Perforin has structural and functional similarities to complement component 9 (C9). Like C9, this protein creates transmembrane tubules and is capable of lysing non-specifically a variety of target cells. This protein is one of the main cytolytic proteins of cytolytic granules, and it is known to be a key effector molecule for T-cell- and natural killer-cell-mediated cytolysis.[4]



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