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Van Loenhout, M.T.J. (author), Van der Heijden, T. (author), Kanaar, R. (author), Wyman, C. (author), Dekker, C. (author)RecA, the key protein in homologous recombination, performs its actions as a helical filament on single-stranded DNA (ssDNA). ATP hydrolysis makes the RecA–ssDNA filament dynamic and is essential for successful recombination. RecA has been studied extensively by single-molecule techniques on double-stranded DNA (dsDNA). Here we directly probe...journal article 2009