FIG. 3.

Differential effects of dsbA and invG mutations on transcription of SPI1 genes. Strains contained the promoter-lac fusions indicated below the graph and were otherwise wild type or contained a deletion of dsbA, invG, or invG dsbA. Data are shown as relative β-galactosidase activities where the level of activity of each fusion in a wild-type background is considered 100%. This allows direct comparison of the fusions. The strains used were JS749 to JS752, JS754 to JS757, and JS767 to JS774. WT, wild type.