Figure 6From: Copper tolerance mediated by polyphosphate degradation and low-affinity inorganic phosphate transport system in Escherichia coli PolyP levels of exponential phase cells exposed to copper. Cells of the indicated strains grown in MT (black line) or MT + P (grey line) for 6 h were exposed with increase copper concentrations for 1 h. After incubation, polyP was quantified as described in Methods. Data are expressed as average ± SD of five independent experiments.Back to article page