FIG. 2.

Effect of elevated active rpoE molecules on cell growth. Cells were grown under the conditions described in Materials and Methods. At the times indicated, the cell density was estimated by measuring the turbidity at OD₆₀₀ (a and c), and the viable cell number (CFU) was determined by counting the colony number 20 h after plating (b and d). W3110 (solid squares) and WK3 (W3110 rseA::Tn10kan; open squares) are shown in panels a and b, and W3110 cells harboring pBR322 (solid circles) or pBRRPOE (open circles) are shown in panels c and d. Symbols represent average values from three different experiments with standard deviations.