Figure 7.

β-Galactosidase assays. Relevant features of the pΔORI (fusion Pmob2::lacZ) and pRNAII (fusion PctII::lacZ) plasmids are indicated. Each plasmid was introduced into Escherichia coli JM109(DE3) harbouring either pLGM2 (mobM expression is induced by IPTG) or vector pET5 (lacking mobM). β-Galactosidase activity (Miller units, MU) was measured in bacteria growing in the absence (−) or in the presence (+) of IPTG. Each result represents the mean of five independent experiments (standard deviations are given).