somA require the response regulator PhoP for expression To determine whether the expression of somA is regulated by transcription factors , the GFP report-ers were transduced into Salmonella strains with mutations in one of the following genes : ompR .
VirK require the response regulator PhoP for expression To determine whether the expression of somA is regulated by transcription factors , the GFP report-ers were transduced into Salmonella strains with mutations in one of the following genes : ompR .