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TEM of killer T-lymphocyte nearing its target cell

TEM of killer T-lymphocyte nearing its target cell

P248/0027

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50.3 MB (4.0 MB compressed)

4961 x 3547 pixels

41.9 x 30.0 cm ⏐ 16.5 x 11.8 in (300dpi)

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Credit

EDELMANN / SCIENCE PHOTO LIBRARY EDELMANN / SCIENCE PHOTO LIBRARY

Caption

False-colour transmission electron micrograph (TEM) of a single, activated cytotoxic ("killer") T-lymphocyte (left, a class of white blood cell) approaching its target cell. T-lymphocytes are involved in cell-mediated response to invasion of body by foreign microorganisms, notably viruses and some bacteria, which are protected from antibodies (secreted by B-lymphocytes) by their host cells. Unlike B-lymphocytes, T-cells do not produce antibodies; instead they recognize selective surface antigens on infected cells. Killer T-cells proceed to destroy infected target cells by direct contact.

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Model release not required. Property release not required.

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