Exposure to mLPM medium reduces CsrB levels.

(A) Levels of CsrB were analyzed during mid-exponential growth in LB medium and at several time points after transfer to several variations of mLPM medium. CsrB levels were quantified from the northern blot in (B) and displayed as arbitrary units (A.U.) after normalized to the 16s rRNA levels. Data from an additional experiment are presented in S6 Fig, showing that this response is reproducible.