COLIN CUTHBERT / SCIENCE PHOTO LIBRARY COLIN CUTHBERT / SCIENCE PHOTO LIBRARY
Cancer research. Male researcher using a fluorescence light microscope to measure the amount of anti-cancer (chemotherapy) drug that has bound to the DNA of individual cancer cells. The sites where the drug has acted on the DNA (deoxyribonucleic acid) are shown up by the light (yellow circles on the monitor at upper right) emitted by a fluorescent dye. This light is detected by a digital camera (the black box on top of the microscope) and sent to a computer where it is analysed to show the extent of cell damage caused by the drug. Photographed in the laboratory of the Paediatric Oncology Unit of the Cancer Research Unit at Newcastle University, England.
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