Kinetic studies of the reaction of S-nitroso-L-cysteine with L-cysteine

Rates for the reaction between L-S-nitrosocysteine and L-cysteine were found to be first order with respect to concentrations of the two reactants in the pH range of 4.85 – 9.41. The second order rate constant was determined to be 3.10 × 10−2 M−1s−1 at pH = 7.4 at 37 °C. Spontaneous decomposition of L-S-nitrosocysteine proceeded with the first order rate constant, 1.46 × 10−5 s−1 under the same conditions.