UTR

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Main articles: Five prime untranslated region and Three prime untranslated region

UTR, which stands for Untranslated Region, refers to either of two sections on each side of a coding sequence on a strand of mRNA. If it is found on the 5' side, it is called the 5' UTR, or if it is found on the 3' side, it is called the 3' UTR.