Extended Data Fig. 3: Evolution of FAD redox states in MmCPDII.

(a) In crystallo spectra of the oxidized (black line), neutral semiquinone (grey line), and fully reduced (dotted black line) states adopted by MmCPDII crystals. The occupancies of 100% for the oxidized and reduced states, as well as 65% for the neutral semiquinone state, were estimated by use of equations 1-3. (b) Projected occupancy of the FAD•- species over time. The projection was calculated by integrating a differential equation system resulting from previously published time constants and a quantum yield of 48%10. Numerical integration was performed using the Tinkercell software68. Integration was performed from 100 ps to 5 ms.