In contrast , the presence of a hilD mutation completely blocked SirA induction of Fig. 5A .
In contrast , the presence of a hilD mutation completely blocked SirA induction of rtsA .
Thus SirA induction of csrBC prevents CsrA action , indirectly activating hilD expression post-transcriptionally .
Thus SirA induction of csrBC prevents CsrA action , indirectly activating hilD expression post-transcriptionally .
SirA , positively regulates hilD .
SirA , independently of BarA , also activates hilD in response to the high acetate concentration .