Abstract
The exchange of DNA strands between broken and intact molecules lies at the heart of fundamental cellular processes ranging from repairing DNA damage by homologous recombination to generation of genetic diversity during sexual reproduction. New work by Lee and colleagues utilizes the DNA curtain method, an elegant single-molecule technique, to demonstrate common and idiosyncratic features in the DNA strand exchange mechanisms of three RecA-family recombinases, bacterial RecA, and eukaryotic Rad51 and Dmc1 proteins.
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