Extended Data Fig. 6: Examinations of the oxyl/oxo and hydroxyl/oxo species between O5 and O6.
From: Oxygen-evolving photosystem II structures during S1–S2–S3 transitions
The mFo-DFc maps contoured at +2.5σ (cyan) and −2.5σ (magenta) superposed with OEC structures of 2F (200 µs) (left) and 2F (5 ms) (right). O5/O6 at distances of 1.9 Å (oxyl/oxo, upper side), 2.4 Å (hydroxyl/oxo, bottom) and 2.2 Å (mixture of the two coupling species, middle) are examined. On the basis of the residual densities, the distance of 1.9 Å fits best with the electron density at 200 μs, whereas it is difficult to distinguish between the distances of 1.9 Å–2.4 Å at 5 ms.
