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![[Figure 1]](lv5059fig1mag.jpg)
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Figure 1
Frequency of elemental ion types in X-ray crystal structures in the PDB, as of September 2013. This does not include instances of these elements as part of other molecules (e.g. heme, chlorophyll or iron–sulfur clusters), but both oxidation states of iron, copper and molybdenum are counted here. Pink bars represent the counts of all deposited structures containing the specified ions; green bars are for structures filtered at 90% sequence identity. |
![[Figure 1]](lv5059fig1.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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