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ClpX apparently affects iron pools through interactions with Dps. Cells were aerated for 2 h and then exposed to cysteine and 2.5 mM H2O2, as shown in Fig. 9A. A defect in iron sequestration by Dps elevates sensitivity to DNA damage. A clpX mutation suppresses the killing rate by 95% in a Dps+ strain but only marginally (25%) in a dps mutant. Strains: LC106, ASE7, SP66, and ASE117.
