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. Author manuscript; available in PMC: 2020 Mar 1.
Published in final edited form as: Mol Microbiol. 2018 Dec 12;111(3):570–587. doi: 10.1111/mmi.14174

Figure 7. FnrS regulation of SPI1 expression is independent of Fur.

Figure 7.

β-galactosidase activity in Salmonella strains containing an fnrS’-lacZ+ transcriptional fusion in the wild type, Δfnr, or Δfur background grown in (A) high aeration or (B) low aeration conditions in the presence or absence of 200 μM dipyridyl (DPP). β-galactosidase activity in Salmonella strains containing (C) hilA’-lacZ+ transcriptional fusion or (D) sodB’-’lacZ translational fusion in the wild type or the indicated mutant background grown in SPI1 inducing conditions. β-galactosidase activity units are defined as (μmol of ONP formed min−1) × 106/(OD600 × ml of cell suspension) and are reported as mean ± standard deviation where n=3. Strains used: JS2129, JS2130, JS2131, JS749, JS2125, JS583, JS2132, JS619, JS2133, JS620, and JS2134.