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. 2000 Jan 4;97(1):151–156. doi: 10.1073/pnas.97.1.151

Figure 4.

Figure 4

pH dependence of the protonation kinetics of T203Y (□) and T203F (●) at low Iex. Fitting the flicker rate (Left, dashed line) allows determination of protonation and deprotonation rate constants as described in the text. The fraction of dark state (Right) is a measure of protonation equilibrium constants.