An rpoS mutant displayed elevated levels of Fis .
an rpoS mutant _ displaying elevated levels of Fis expression under these conditions
Hirsch M , Elliot T. Fis regulates transcriptional induction of rpoS in Salmonella enterica .
The exponential phase expression of PtopAEc was slightly elevated in the absence of rpoS , perhaps due to stimulation by elevated FIS levels .