Supplementary Figure 11: Radial plots of distances from water and Mg atoms to other atoms.
From: Measurement of atom resolvability in cryo-EM maps with Q-scores
Oxygen atoms in water are labeled H2O, whereas oxygen/nitrogen atoms in protein are labeled O/N. In the X-ray structure (a), sharp peaks can be seen at 2.8Å for H2O-H2O (water-water) and H2O-O (water-protein). In models fitted and refined in cryoEM maps (b, c), a H2O-O peak can also be seen at 2.8Å, however peaks for H2O-H2O (‘second-layer’ water) are more broad/diffuse.
