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Frameshifting ribosomal

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frameshifting, ribosomal

a directed change in translational reading frame that allows the production of a single protein from two or more overlapping genes. The process is programmed by the nucleotide Sequence of the mrna and is sometimes also affected by the secondary or tertiary mrna structure. It has been described mainly in viruses (especially retroviruses), retrotransposons, and bacterial insertion elements but also in some cellular genes.