However , there are indications that CRP-cAMP also plays a different role as an activator of rpoS expression during the late stages of growth .
further _ suggesting that cAMP-CRP upregulated rpoS expression
further _ suggesting that cAMP-CRP upregulated rpoS expression
cAMP-CRP stimulated transcription of rpoS .
Interestingly , in the stationary-phase , we still observed a slight increase of rpoS transcription in the ppk mutant compared with WT , although both of the cAMP-CRP-binding sites were mutated ( Fig. 6B ) .