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<p><a href="page.php?w=Three_prime_untranslated_region">Three prime untranslated region</a>s (3´UTRs) of <a href="page.php?w=messenger_RNA">mRNAs</a> often contain regulatory sequences that post-transcriptionally cause RNAi. Such 3´-UTRs often contain both binding sites for <a href="page.php?w=microRNA">miRNAs</a> as well as for regulatory proteins. By binding to specific sites within the 3´-UTR, miRNAs can decrease gene expression of various mRNAs by either inhibiting translation or directly causing degradation of the transcript. The 3´-UTR</p><p>
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