COLIN CUTHBERT / SCIENCE PHOTO LIBRARY COLIN CUTHBERT / SCIENCE PHOTO LIBRARY
Cancer research. Female researcher examining DNA autoradiographs on a computer monitor during research into childhood brain tumours. Radioactively-labelled pieces of tumour DNA (deoxyribonucleic acid) were separated by gel electrophoresis into bands representing the genetic code. To produce an autoradiograph of these bands, a phosphor screen (not seen) is exposed to the gel, before undergoing laser-induced fluorescence in the phosphorimager autoradiography system (lower right). Comparison with healthy tissue will indicate regions of genetic alteration. Photographed in the Cancer Research Unit at Newcastle University, England.
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