R.A. LONGUEHAYE / SCIENCE PHOTO LIBRARY R.A. LONGUEHAYE / SCIENCE PHOTO LIBRARY
Immunology. Immunologist using a FACScan to analyse the response of white blood cells to cytokines. Cytokines are signalling chemicals released by white blood cells that influence the behaviour of other white blood cells during an immune response. A FACScan (fluorescence activated cell sorter) counts cells by using an antibody to identify proteins on their surface.
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