Figure 2.

(a) Survival of S. aureus SH1000, its isogenic SaNOS mutant, and the mutant complemented with SaNOS gene in trans from a lethal dose (350 mM) of H₂O₂ with and without supplementation with 1 mM L-arginine. (b) Survival of wild-type S. aureus SH1000 pretreated with 5 mM L-NAME from 350 mM H₂O₂. (c) Survival of SaNOS mutant of S. aureus SH1000 pre-treated with 2.5 mM sodium nitroprusside from 350 mM H₂O₂. *Significant at P < 0.05.