Workers at Cellmark checking DNA autoradiographs

Workers at Cellmark checking DNA autoradiographs

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Caption: Forensic science laboratory using DNA fingerprinting. Overhead view of laboratory technicians checking DNA autoradiographs (autorads). These are produced by labelling the DNA fragments in an electrophoresis gel with a radioactive marker chemical. The gel is then placed on an piece of X-ray film, the radiation from the marker leaves a dark patch, representing each fragment, on the film after development. Comparison of autorads from two samples of DNA is the method by which a correlation may be made - so-called DNA fingerprinting. Photographed at Cellmark Diagnostics, a commercial laboratory at Oxford, England.

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Keywords: autoradiograph, checking, dna, dna fingerprinting, forensic, forensic laboratory, forensics, laboratory, research, science, technology

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