Is kinetoplastid pan-editing the result of an evolutionary balancing act?

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Abstract
Kinetoplastid U‐insertion/deletion type editing is a highly elaborate process to generate translationally competent mitochondrial mRNAs. All evolutionary models to explain its origin and extent in present day organisms lack a convincing description of the advantage(s) responsible for an active increase of the editing potential. This advantage can be found in the gene fragmentation that is inherent in pan‐editing which gives protection against loss of temporarily non expressed mitochondrial genes during periods of intense intraspecies competition. iubmb Life, 58: 91‐96, 2006

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