The OmpR/EnvZ two-component regulatory system regulates the porin genes ompF to changes in osmolarity .
In S. Typhi , the OmpR/EnvZ system is involved in the regulation of ompF porin genes , where both OmpF are expressed as abundant outer-mem-brane proteins as in E. coli .
In S. Typhi , the OmpR/EnvZ system is involved in the regulation of ompF porin genes , where both OmpC are expressed as abundant outer-mem-brane proteins as in E. coli .