A. A scheme of double-strand break repair in E. coli, with the critical enzymes marking the corresponding stages.
B. Survival of recombinational repair mutants after 2 mM H2O2-alone treatment.
C. A representative gel showing chromosome fragmentation in WT versus recA and recBCD mutants treated with 2 mM H2O2.
D. Quantification of the chromosomal fragmentation upon treatment with 2 mM H2O2.