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![[Figure 6]](hi5647fig6mag.jpg)
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Figure 6
Plot of Iobs/σ(Iobs) versus resolution for PDB entry 4epz. (a) At high resolution ice rings are clearly visible, while at low resolution the values are clustered, forming a `ladder-like' scatter plot. (b) The same plot coloured by multiplicity. The higher the multiplicity the larger Iobs/σ(Iobs) is, thus accounting for the behaviour. The value of a measurement is less uncertain the more often it has been made, as shown for example by Watkin & Cooper (2016  ). At low resolution, the main influence on these values is their multiplicity. In contrast, at high resolution weaker reflections are influenced by other factors. |
![[Figure 6]](hi5647fig6.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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