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![[Figure 8]](qr5001fig8mag.jpg)
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Figure 8
An ion (green ball) and several water molecules (red balls) in the vicinity of three residues from apoferritin. (a), (b) and (c) show cryo-EM maps and models, while (d) shows an X-ray map and model. In the cryo-EM maps, the ion and water molecules were placed using the automated SWIM procedure (Zhang et al., 2020  ). The radial plots at the bottom show the numbers of water molecules and ions at various distances from nearby polar or charged protein atoms (O or N). |
![[Figure 8]](qr5001fig8.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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