Figure 5.
Time- and concentration-dependent inactivation of DDAH by 1 at pH 5.0. (A) Exponential fits to the observed inactivation of DDAH (29 μM) by different concentrations of inhibitor: 0 (○), 330 μM (λ), 500 μM (□), 1 mM (ν), 1.5 mM (△), or 3 mM (▲), each in MES buffer (100 mM), KCl (100 mM), EDTA (0.05 mM) at pH 5.0, 25 °C. (B) Concentration dependence of the pseudo-first-order kobs values shows saturation kinetics and is fitted by KI (2.6 ± 0.8 mM) and kinact (0.18 ± 0.03 min−1) values for inactivation.
