FIG. 10.

Intracellular accumulation of citrate. Intracellular citrate concentrations were determined in exponentially growing cells in the absence (solid bars) or presence (stippled bars) of 1 mM paraquat. Error bars represent the standard deviations of measurements in three independent cultures; where they are not visible, the deviation was <0.1 mM. The asterisk next to the acnA acnB strain indicates the recognition that this strain grows substantially more slowly than the others. The strains were W3110 (wild type) and its isogenic derivatives, JRG2789 (AcnB⁺), JRG3258 (AcnA⁺), and JRG3259 (Acn⁻).