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. 2012 Apr 4;287(22):18262–18274. doi: 10.1074/jbc.M111.298927

FIGURE 3.

FIGURE 3.

Reductive nitrosylation observed rate constants for isolated Hb chains. Ferric Hb (HbFe3+) chains were mixed with NO (final concentrations 2–1000 μm) from ProliNONOate. Protein concentrations used (in heme) were 10–45 μm (α-chains) and 10–90 μm (β-chains). Reactions were performed at 37 °C in 100 mm sodium phosphate (pH 7.4). A, Hb α-chains. B, Hb β-chains. The insets show the observed rate constants in the low NO range.