Figure 2From: Relevance of the two-component sensor protein CiaH to acid and oxidative stress responses in Streptococcus pyogenesAnalysis of the growth of wild-type, spy1236 knockout, and complemented strains cultured in acidic (pHÂ 6.0) media in an atmosphere containing 5% CO 2 . The CFU/ml after 23Â h, broth culture of wild-type strain 1529 and its derived strains are shown. Viable counts were performed on BHI-Y and sheep blood agar plates. At least three independent experiments were performed and they always yielded essentially the same results. The error bars indicate the standard error of the mean.Back to article page