Fig. 4: Structural dynamics at the O4 and Cl-1 channels during S1–S2–S3 transitions.
From: Oxygen-evolving photosystem II structures during S1–S2–S3 transitions
a,b, Structures of PSII at the O4 and Cl-1 channels are superposed with Fobs(1F) – Fobs(Dark) (a) and Fobs(2F) – Fobs(1F) (b) difference density maps contoured at +3.5σ (green) and −3.5σ (orange) with delay times from 20 ns to 5 ms. The intermediate structures of D1, D2, CP43 and PsbO proteins are depicted in yellow, cyan, magenta and orange, respectively, and the colours of other atoms are the same as those in Figs. 1 and 2.
