B

Fig. 13. Effect of desferal and cysteine on the decomposition of Cys-NO as monitored by the optical absorption at 340 nm. The kinetics was studied at room temperature in HEPES open to ambient air (15 mM, pH 7.4). Panel A: (1) decomposition of 2 mM Cys-NO without additives; (2) decomposition of 1.5 mM Cys-NO in presence of 0.5 mM cysteine; (3) 2 mM Cys-NO in presence of 1 mM desferal; (4) 2 mM Cys-NO in presence of 1 mM cysteine. Panel B: (1) 2 mM Cys-NO in presence of 0.1 mM cysteine; (2) 2 mM Cys-NO in presence of 0.25 mM cysteine. (From Ref. [32].)

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