Kiel et al. 10.1073/pnas.0401160101.

Fig. 6. Plot of the observed rate constant kobs against the Raf–Ras-binding domain (Raf-RBD) concentration for the binding of Ras·2′,3′-N-methylanthraniloyl-5′-guanosyl-b, g -imido-triphosphate to Raf-RBDWT. These measurements have been performed at 15°C in 15 mM Hepes buffer, pH 7.4/5 mM MgCl2/125 mM NaCl. The curve was fitted according to Eq. 1.