Fig. 2: Structural dynamics in the YZ area during S1–S2–S3 transitions.
From: Oxygen-evolving photosystem II structures during S1–S2–S3 transitions
a,b, Structures of PSII in the YZ area are superposed with Fobs(1F) – Fobs(Dark) (a) and Fobs(2F) – Fobs(1F) (b) difference density maps contoured at +4.0σ (green) and −4.0σ (orange), with delay times from 20 ns to 5 ms. Water molecules at ground and intermediate states are depicted by red and cyan spheres, respectively. The Mg atom in PD1 is shown as a grey sphere for the ground structure and a violet sphere for the intermediate structure. O6* and O6 (in the other figures) are depicted in magenta, and the Ca ion of the OEC is in blue. The same colour scheme is used in other figures, unless otherwise stated.
