Figure 7From: Copper tolerance mediated by polyphosphate degradation and low-affinity inorganic phosphate transport system in Escherichia coli Pi efflux from exponential phase cells exposed to copper. 6 h MT (black bars) or MT + P (grey bars) cells of the indicated strains were resuspended in T buffer and exposed to 0.25 mM Cu2+ during different times. Pi was quantified in supernatants as described in Methods. Data are expressed as average ± SD of three independent experiments.Back to article page