These loci represent PmrA-activated genes , like those identified in this study , that are regulated by PmrA at the transcriptional level and that do contain ( yibD ) or do not contain ( dgoRKAT ) the consensus binding site ( within a 200 bp region upstream of the translational start ) binding of PmrA to dgop1 , PmrA was incubated with dgop1 and specific or non-specific cold ( unlabeled ) competitors .
Among the genes were several previously characterized PmrA-activated genes : pmrH ( STM2297 ) , pmrF , pmrC ( yjdB ) , pmrA ( basR ) , pmrB ( basS ) , yibD and pmrG ( ais ) .
The PmrA-activated yibD and dgoA genes are dispensable for resistance to polymyxin B and Fe ( III ) ( Tamayo et al. , 2002 ) .