Extended Data Figure 3 : Anomalous signals of the metal ions obtained with the XFEL beam.

From: Native structure of photosystem II at 1.95 Å resolution viewed by femtosecond X-ray pulses

Extended Data Figure 3

Shown are anomalous difference Fourier maps contoured at 5σ distributions. a, Manganese atoms of the OEC. b, The non-haem iron in the acceptor side between QA and QB.