tRNA modifications: Necessary for correct tRNA-derived fragments during the recovery from stress?

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Endonuclease-mediated tRNA fragmentation has been observed in many species suggesting functional importance for tRNA fragments. The size distribution of tRNA-derived fragments indicates the existence of mechanisms that protect tRNAs and their fragments from total degradation by exonucleases. Could post-transcriptional modifications be important for the controlled processing of tRNAs?

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