B-lymphocyte. Coloured Scanning Electron Microgr- aph of a group of B-lymphocyte white blood cells. The cell surfaces are covered with tiny ridges and projections called microvilli,which help it bind to target proteins. B-cells account for 10% of the body's lymphocytes. On encountering a foreign antigen,such as a bacterial surface protein,the immature B-cell either divides into a number of plasma cells,which produce antibodies that kill the invader,or it matures into a memory cell. Memory cells remain in the body for years,giving immunity to the original pathogen. Magnification x2000 at 6x7cm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / CNRI |
Taille de l’image : | 3666 px × 2642 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |