NANCY KEDERSHA / SCIENCE PHOTO LIBRARY NANCY KEDERSHA / SCIENCE PHOTO LIBRARY
Leukaemia. Immunofluorescent light micrograph of cultured T-lymphocytes from a patient suffering from Large Granular Lymphocytic Leukaemia. These cells are derived from killer or cytotoxic T-cells & not "helper" T-cells. Cytotoxic granule protein is stained green, nuclei blue and cytoplasm red. In leukaemia certain types of white blood cells are produced in excess. These abnormal cells suppress normal production of white and red cells, thereby increasing the susceptibility to anaemia, infection and tumours. Immunofluorescence is a staining technique which uses antibodies to attach fluorescent dyes to specific tissues and molecules in the cell. Magnification: x187 at 35mm size.
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