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To assess the contributions of single-strand DNases (ssDNases) to recombination in a recBCD+ background, we studied 31 strains with all combinations of null alleles of exonuclease I (delta xon), exonuclease VII (xseA), RecJ DNase (recJ), and SbcCD DNase (sbcCD) and exonuclease I mutant alleles xonA2 and sbcB15. The xse recJ sbcCD delta xon and xse recJ(More)
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