58.0 MB (1.3 MB compressed)
5551 x 3655 pixels
47.0 x 31.0 cm ⏐ 18.5 x 12.2 in (300dpi)
BSIP LECAQUE / SCIENCE PHOTO LIBRARY BSIP LECAQUE / SCIENCE PHOTO LIBRARY
Killer T-lymphocytes. Coloured scanning electron micrograph (SEM) of T-lymphocyte killer cells attacking a cancer cell. Four small rounded killer T-lymphocyte cells, a type of white blood cell (leucocyte), are seen at right. One of these cells (at centre) has attached itself to a large undifferentiated cancer cell (at left) and is attacking it. It recognises the cancer cell by its surface antigens. Once it attaches it will kill the cell, so acting as an important mechanism in the body's immune response. Magnification unknown.
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