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. Author manuscript; available in PMC: 2005 Sep 29.
Published in final edited form as: Mol Microbiol. 2003 Oct;50(2):549–561. doi: 10.1046/j.1365-2958.2003.03704.x

Fig. 7.

Fig. 7

A rpoS mutation reduces adaptive mutation in various backgrounds. The accumulation of Lac+ mutations in Lac− cells incubated on lactose minimal medium. From left to right: Wild type = FC40; rpoS = PFG72; sulA = FC1417; sulA rpoS = PFG185; LexA(Ind−) = FC1418; LexA(Ind−) rpoS = PFG184; sulA LexA(Def) = FC1419, sulA LexA(Def) rpoS = PFG186; recG = FC526; recG rpoS = PFG36. Data are the mean number of Lac+ colonies appearing each day from days 3–5; each point is the mean of four cultures ± SEM. Three experiments are shown: the first was with the wild type and rpoS mutant strain; the second was with all the derivatives of the sulA mutant strain; and, for comparison, the data for recG and recG rpoS from the experiment shown in Fig. 3 were recalculated in the same format.