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Figure 1
Number of reflections per atom for all X-ray crystal structural models in the PDB (February 2011). Note that this number depends on the solvent fraction of the crystal. A large number of reflections per atom usually corresponds to a structure refined against very high resolution data, but it may also indicate a structural model that describes only one copy of a molecule present in multiple copies related by explicit noncrystallographic symmetry, e.g. one subunit of an icosahedral virus capsid.

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