Abstract:In bacteria, the mechanisms used to repair DNA lesions during genome replication include homologous recombination between sister chromosomes. This can lead to the formation of chromosome dimers if an odd number of crossover events occurs. The concatenated DNA must be resolved before cell separation to ensure genomic stability and cell viability. The broadly conserved dif/Xer system counteracts the formation of dimers by catalyzing one additional crossover event immediately prior to cell separation. While dif/X… Show more
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