Extracellular tellurite concentration in culture supernatants.

<p>Tellurite concentration was determined in supernatants of <i>E. coli</i> cultures that had been exposed to tellurite (20 µg ml⁻¹) in the absence (control) or presence of the indicated CTX concentrations. Values represent the average of 3 independent experiments. Statistical significance was determined using t-test. (**) p<0.01.