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. 2001 Feb 20;98(5):2370–2374. doi: 10.1073/pnas.041614298

Figure 4.

Figure 4

Kinetics of MbO2 oxidation by nitrite. (a) Kinetics of oxidation of 20 μM MbO2, observed when MbO2 is mixed with 0.1% NOInline graphic (wt/vol) in a 50 mM sodium acetate/HCl buffer ≈5 min after exposure of deoxyMb to air to produce MbO2. Complete UV-Vis optical absorbance spectra were obtained on a dual-beam OLIS (Jefferson, GA) stopped-flow apparatus. Filling of the chamber required 20 ms. (b) pH dependence of these kinetics.