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retrotransposon |
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retrotransposon [¦re·trō·tranz′pō‚zän] (cell and molecular biology) A small, mobile deoxyribonucleic acid (DNA) sequence that can retrotranspose, that is, move from one genomic location to another by producing ribonucleic acid (RNA) that is transcribed by reverse transcriptase back into DNA which is then inserted at a new site. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Researchers hypothesize that retrotransposons derived from viruses that infected cells early in animal evolution. The longer ones, measuring 24-26 nucleotides, are suspected to be more involved with regulating retrotransposons and DNA methylation. By this one simple [mutation], we've solved the problem of how retrotransposons became retroviruses," says Hildreth. |
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