This Week in Science

In Science this week, an international team of researchers report new data showing that 3' transductions mediated by long interspersed nuclear element–1 (L1) retrotransposons — mobile repetitive elements found throughout the human genome — are present in many cancer genomes. Looking at the cancer genomes of 244 patients, the scientists discovered that tumors from 53 percent of the patients had somatic retrotranspositions, of which 24 percent were 3' transductions.

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