Natural killer cell. Coloured Scanning Electron Micrograph (SEM) of a human Natural Killer (NK) cell. The NK cell has numerous cellular projections which are used to attack foreign cells. Natural killer cells are a type of white blood cell. As part of the body's immune response mechanism, NK cells have the ability to destroy virus-infected cells & tumour cells. On contact with the surface of a tumour cell, the NK cell recognizes certain proteins called antigens, which activate its cell- killing mechanism. The NK cell then binds to & destroys the cancer cell using toxic chemicals. Magnification: x10, 500 at 6x6cm size. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / EYE OF SCIENCE |
Bildgröße: | 3520 px × 3543 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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