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Researcher with electrophoresis plate -wheat genes

Researcher with electrophoresis plate -wheat genes

G210/0510

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Credit

RICHARD T. NOWITZ / SCIENCE PHOTO LIBRARY RICHARD T. NOWITZ / SCIENCE PHOTO LIBRARY

Caption

DNA Research. A researcher examining the genes from a wheat plant which are revealed on an electrophoresis X-ray plate. A transparent gel is loaded with the radioactively tagged DNA & under the influence of an electric field, fragments of the DNA separate according to their size. This DNA sequencing results in a unique banding pattern of DNA fragments across the gel. The banding pattern is then recorded by exposing X-ray film to the radiation emitted by the DNA fragments. The technique of sequencing DNA into a banding pattern allows the structure of genes to be studied. The transparent gel used in electrophoresis commonly consists of agarose.

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