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Arabinose control of RpoS protein levels in strain DMS2564. (A) Increasing the arabinose concentration results in greater RpoS expression in strain DMS2564, as measured by Western blotting. n = 4 to 5. Error bars represent standard errors of the mean results. wt, wild type. (B) Flow cytometric measurement of an otsB-gfp fusion under 0%, 10−4%, and 10−1% arabinose (dotted line, dashed line, and solid line, respectively).
