Figure 7. The viscosity-dependence of the slower steps in the Pr → Pfr photoconversion.

The viscosity dependence of the rate constant for the 1^st (A), 2^nd (B), 3^rd (C) and 4^th steps (D) of the increase in absorbance at 720 nm are shown. All measurements were recorded over a range of timescales and the data are fitted to equation 2 as described in the Materials and Methods. The error bars were calculated from the average of at least 3 traces.