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![[Figure 4]](rr5232fig4mag.jpg)
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Figure 4
Difference electron density for the ligands. The models shown in ball-and-stick representation are the final refined structures. The difference density, clipped around the ligands, is for the maximum-likelihood maps before introduction of the ligand or iron ion into the models. The maps are contoured at levels of between 0.2 and 0.3 e Å−3, reflecting the resolution of each structure. (a) Gst–iron(III)-5-LICAM, (b) Gst–iron(III)-azotochelin, (c) Pth–iron(III)-5-LICAM, (d) Pth–iron(III)-azotochelin. There is a significant anomalous density peak at each of the iron positions (not shown). |
![[Figure 4]](rr5232fig4.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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