NANCY KEDERSHA / IMMUNOGEN / SCIENCE PHOTO LIBRARY NANCY KEDERSHA / IMMUNOGEN / SCIENCE PHOTO LIBRARY
Apoptosis. Immunofluorescent Light Micrograph of a culture of normal human epithelial cells, showing apoptosis or "genetically programmed cell death". Cell nuclei are blue; cytoplasm stains red or green. A few green cells have undergone apoptosis: their nuclei and cytoplasm have fragmented and shrunk into blobs which are scattered (at upper frame). These cell remnants will then be eaten by the neighbouring cells. Research on apoptosis may provide genetic treatments for diseases such as cancer. Immunofluorescence uses antibodies to attach fluorescent dyes to cell structures. Magnification: x250 at 5x7cm size.
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