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Analyses of Lon function necessary for survival of ppGpp0 strain. (A) Strains carrying the plasmid indicated were scored for retention or the loss of pRCSp-spoT as described in the legend to Fig. 1 in the presence or absence of 0.2% arabinose (ara) in LB Amp IPTG X-Gal plates. Other relevant genotypes of the strains also are indicated. (B) Plating efficiency was determined for the same set of strains in LB containing Amp and Sp in the presence or absence of arabinose.
