Fig. 3. Graph representing cytochrome reduction and inhibition of VO₂ in induced Tet-iNOS 293 cells upon addition of 0 µM (blue), 1 µM (red), 2.5 µM (green), 5 µM (magenta) and 10 µM (cyan) L-arginine, and 0 µM (teal) and 2.5 µM (gold) L-arginine in the presence of 500 µM S-EITU (n=6 for each group). Left and right sides of bars indicate [O₂] at which significant (P<0.001) changes from baseline values occur in cytochromes aa₃ and VO₂, respectively. Arrow indicates addition of L-arginine at 71.3±3.4 µM O₂ (n=30).