Multicolor photoreactions of the red light–activated channelrhodopsin Chrimson - Johannes Vierock; Joel C. D. Kaufmann; Lukas Faiß; Linda Tillert; Benjamin S. Krause; Paul Fischer; Thi Bich Thao Nguyen; Dietmar Schmitz; Benjamin R. Rost; Franz Bartl; Peter Hegemann (Proceedings of the National Academy of Sciences, 2025)