After 10 difficult years of work, researchers announced in 1993 that they had located the gene causing Huntington's disease. Since then, the pace at which other disease-causing genes have been found has greatly accelerated, so that genes are typically located in no more than two years. Now a new tool that can reduce the time needed for a critical step involved in gene identification, from perhaps as much as 10 months to a day, should allow gene discoveries to be made much faster still.

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