Fig. 2.

Four RNR inhibitors that also have bactericidal effect on growth of P. aeruginosa (Table 1): toluidine blue (NSC36758, ○), streptonigrin (NSC45383, ●), NSC361666 (□), NSC228155 (■), and hydroxyurea (△). All four inhibitors were significantly more potent than hydroxyurea. Toluidine blue exhibited >70% inhibition even at 13 nM (discussed in main text).