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Effect of expression of Lon variants on survival during treatment with nalidixic acid. Exponentially growing cells deficient in chromosomal lon and containing pBAD24 vector (A) (strain KD3037), pBAD24lon+ (B) (strain KD3045), pBAD24lon S679A (C) (strain KD3039), or pBAD24lon K362Q (D) (strain KD3041) were cultured with 0.1% arabinose (filled circles) or without arabinose (open circles) and treated with nalidixic acid as described in the legend to Fig. 1.
