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Cellular levels of various mutant forms of RpoS in exponential phase. Cells expressing wild-type or mutant versions of RpoS from pBAD18 in wild-type, rssB∷cat, or clpP∷cat backgrounds were grown in minimal medium M9 with 0.4% glycerol. Immunoblots are shown demonstrating cellular RpoS levels during exponential phase (at an OD578 of 0.6).
