We also found that H-NS represses acrEF .
A recent study has shown that acrEF is repressed by H-NS ,36 whereas acrAB is not repressed .
K. Nishino , M. Hayashi-Nishino , A. Yamaguchi , H-NS modulates multidrug resistance of Salmonella enterica serovar Typhimurium by repressing multi-drug efflux genes acrEF , Antimicrob .