NANCY KEDERSHA / SCIENCE PHOTO LIBRARY NANCY KEDERSHA / SCIENCE PHOTO LIBRARY
Skin cancer. Immunofluorescent Light Micrograph of squamous carcinoma cells, cultured from a tumour. This highly malignant cancer arises in epithelium: typically of the skin. DNA and nuclei stain blue and tubulin, a structural protein, is green. Areas of contact between cells appear as red outlines. Squamous cell carcinoma may be caused by high exposure to the sunlight. It is common in pale- skinned fair-haired people over age 60. Immunofluorescence is a staining technique which uses antibodies to attach fluorescent dyes to specific tissues and molecules within the cell. Magnification: x320 at 6x4.5cm size.
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