Fig 4.

PhoA activities of V. cholerae VCA0687::phoA and ΔuhpA VCA0687::phoA strains grown in M9 supplemented with various carbon sources. Strains were grown in M9 medium as indicated. Alkaline phosphatase activities (in Miller Units) of cultures of the VCA0687::phoA and ΔuhpA VCA0687::phoA transcriptional fusion strains grown for 8 h were measured. Shown are the means of at least four independent measurements. The error bars indicate standard deviations. *, significant differences between the respective data sets in comparison to the M9 glycerol control condition (Kruskal-Wallis test followed by posthoc Dunn's multiple comparisons; P < 0.05).