Fig. 4. (a) Flash-induced absorption changes on a ps/ns timescale for 64 μM WT MmCPDII at five selected wavelengths (see Fig. S2† for all measured wavelengths). (b) Initial (extrapolated to t = 0) and final amplitudes for all measured signals compared to difference spectra for the formation of FAD˙^– + TrpH˙⁺ and FAD˙^– + Trp˙, respectively, and containing small amounts (7 and 4%, respectively) of hydrated electrons e^–_aq (see note ¶ for more details). The sample was excited at 355 nm by a 100 ps pulse of E ∼ 5 mJ per cm². The traces are averages of 16 to 64 signals recorded with a repetition rate of 1 Hz.