Saturday, November 25, 2006

DNA copying

It appears that many more genes than once thought have multiple copies of themselves, called "copy-number variants" -- some of which may contain disease-causing mutations, researchers report.While scientists have long thought that genes appear in paired copies, researchers reporting in the Nov. 23 Nature say that many have three copies or as few as one. Moreover, these variations appear to occur in many more genes than was once thought.


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