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Sensor Uses Qdots to Detect DNA

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BALTIMORE, Md., Dec. 6 -- Using tiny semiconductor crystals, biological probes and a laser, Johns Hopkins University engineers have developed a way to find specific sequences of DNA by making them light up beneath a microscope. The researchers, who say the technique will have important uses in medical research, demonstrated its potential in their lab by detecting a sample of DNA containing a mutation linked to ovarian cancer. The technique involves an unusual blend of organic and inorganic components.    Jeff Tza-Huei Wang, supervisor of the research team and senior author of a paper on...Read full article

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