Fig. 4: Chromophore structures as Pr and Pfr.
Superimposed ambient temperature SFX Pr and Pfr (9ER4 and 9F4I, respectively; sticks) and cryogenic Pr (PDB 8R44, thin lines) structures. Carbons and waters, cyan and green in Pr and Pfr, respectively; oxygens, red; nitrogens, blue; waters, spheres and stars. Red arrows indicate the likely clockwise photoflip of ring D and the associated chromophore rotation within the pocket. The thioether attachment to C323 is shown along with H324 and the pyrrole water (PW). a view from the α face. b lateral view from ring D.
