Figure 5: Kinetics of the formation and decay of intermediate O in the photocycle of detergent-solubilized NaR, measured at λ = 605 nm at different NaCl concentrations.

(A,B) Experimental data and model curves obtained by fitting according to equation 1 (see text), respectively. Yellow, purple, green, red, blue, and black curves correspond to NaCl concentrations of 4, 8, 16, 32, 64, and 200 mM, respectively. Experimental conditions as in Fig. 4. (C) Dependence of kinetic constants of (L↔M) → O (k2) and O → NaR (k3) transitions on Na+ concentration.