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This lymphocyte kills infected or tumor cells.


The Cytotoxic T Lymphocyte
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Cytotoxic T lymphocytes (CTL) recognize surface markers on other
cells in the body that label those cells for destruction. In this way,
CTLs help to keep virus-infected or malignant cells in check. Here,
a smaller CTL (arrow) is attacking and killing a much larger
influenza virus-infected target. The sequence represents 30 minutes
elapsed time.

 
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