As suggested by our previous study , establishing the Mg2-responsive regulation of these loci requires the transcriptional repressor H-NS ; thus the mRNA level is reduced greatly in the phoP mutants in low-Mg2 conditions .
As suggested by our previous study , establishing the Mg2-responsive regulation of these loci requires the transcriptional repressor H-NS ; thus the mRNA level is reduced greatly in the phoP mutants in PhoP-activating conditions .