FIG. 2.

Stationary-phase survival. Cultures in PYE were sampled at the indicated times, and titers were determined on PYE plates without antibiotics. The OD₆₀₀ values at 0 h were 0.06 to 0.11 and for exponential-phase samples (4.5 to 6 h) were 0.29 to 0.65. Saturation OD₆₀₀ values for skgA and skgB strains were slightly lower than those for the katG-null and Tn5 control strains, 1.0 to 1.2 versus 1.2 to 1.5. Strains used were SGC111 katG (■), SGC125 Tn5 control (●), SGC127 skgA::Tn5 (○), and SGC126 skgB::Tn5 (▴).