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Table 2 Growth of spy1236 knockout mutant in acidic (pH 6.0) media in an atmosphere containing 5% CO 2

From: Relevance of the two-component sensor protein CiaH to acid and oxidative stress responses in Streptococcus pyogenes

Strains OD660 Av. CFU/mL
(pH7.6)   
1529wt 0.906 ± 0.009 3.4 ± 0.7 × 108
1529Δspy1236 0.927 ± 0.025 2.0 ± 0.6 × 108
(pH6.0)   
1529wt 0.662 ± 0.009 4.1 ± 1.6 × 105
1529Δspy1236 0.571 ± 0.039 2.3 ± 1.0 × 104
  1. The experiment was performed as described in Figure 1. At least three independent experiments were performed and they always yielded essentially the same results. Values expressed are the means (±SEM).