Natural killer cell. Coloured scanning electron micrograph (SEM) of a natural killer cell (NK) (purple) attacking a liver cancer cell. NK cells of a healthy individual were cultured with hepatoma (HepG2) cells. Natural killer cells, also known as large granular lymphocytes (LGL), are a type of cytotoxic lymphocyte critical to the innate immune system that belong to the rapidly expanding family of known innate lymphoid cells (ILC) and represent 5â??20% of all circulating lymphocytes in humans. NK cells provide rapid responses to virus-infected cell and other intracellular pathogens acting at around 3 days after infection, and also respond to tumor formation. Magnification x 10000 at 10cm wide. Specimen courtesy of the Maini Lab. UCL. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4408 px × 3965 px |
Model Release : | Non requis |
Restrictions : | - |