FIGURE 2.

The pezAT mutant strain forms shorter chains and is more prone to lysis at stationary phase. (A) Growth patterns for both R6wt and R6ΔPezAT mutant strains were assessed by measuring OD₆₅₀ every 30 min. (B) The number of CFU/ml at OD₆₅₀∼0.2, 0.4, 0.6, and 0.8 were determined. t-test was used to evaluate the statistical differences and the asterisk symbol (^∗) denotes statistical significance (p-value < 0.05) between R6wt and R6ΔPezAT. (C) The morphology of the cells of both strains was examined under phase-contrast microscope. Pictures were taken at 100× magnifications, 200 ms.