SirA-dependent regulation of serovar Typhimurium sopB .
SirA-dependent regulation of serovar Typhimurium sopB .
SirA-dependent regulation of sopB chromosomal lacZY fusions during chemotaxing through 0.3 % TS agar .
A screen revealed that SirA regulates not only expression of SPI1-encoded genes but also the transcription of SPI5-encoded sopB .