FIG. 1.

A-NO₂⁻-mediated killing of P. aeruginosa FRD1 under anaerobic conditions. NaNO₂ concentrations tested were 0 μg ml⁻¹ (closed circles), 64 μg ml⁻¹ (open circles), 128 μg ml⁻¹ (squares), 256 μg ml⁻¹ (triangles), 512 μg ml⁻¹ (diamonds), and 1,024 μg ml⁻¹ (stars).The graphs display the averages and standard deviations of three independent cultures analyzed concurrently.