In addition to these conditions , hilA is repressed by PhoP/PhoQ .
PhoP/PhoQ is activated by low cation concentrations , implying that hilA is repressed by these conditions .
Since the PhoP/PhoQ system represses hilA expression , it can be speculated that either virK are regulated by PhoP/PhoQ in an opposite way or VirK negatively influences hilA expression .
Since the PhoP/PhoQ system represses hilA expression , it can be speculated that either both hilA are regulated by PhoP/PhoQ in an opposite way or VirK negatively influences hilA expression .