Fig. 6. Chlorate inhibition of NrtA and NrtB transporters. Lineweaver–Burk plots showing the effect of chlorate on NrtA and NrtB at a series of nitrate concentrations. Chlorate showed competition with nitrate for NrtA (expressed in nrtB110) (a) and for NrtB (expressed in nrtA1) non-competitive inhibition by chlorate was observed (b). ♦, No inhibitor added; •, inhibitor added.