FIG. 4.

Growth curves of SS1 (▪) and SS1(ΔhpaA) (□). Bacteria were grown in liquid shaking culture, and the OD₆₀₀ was measured at 0, 4, 8, and 12 h and at days (d) 1, 2, 3, 4, and 7. Data are shown as a representative experiment of two independent experiments.