 | Acta Crystallographica Section D Acta Crystallographica Section D BIOLOGICAL CRYSTALLOGRAPHY |
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![[Figure 17]](ba0020fig17mag.jpg)
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Figure 17
The diffraction sphere (dashed line) corresponding to the highest resolution limit of diffraction and the Ewald sphere at the start and end of a 180° rotation. The lower side of the Ewald sphere covers one part of the reciprocal space (green) and the upper side another part (brown). They overlap over the 2θmax range (dark brown). If a monoclinic crystal is rotated around its twofold axis, 180° is sufficient to achieve full completeness, even if individual Bijvoet mates have to be recorded separately for anomalous data. If the crystal is triclinic, 180° is sufficient for the native data, owing to the centrosymmetric relation between the non-covered region (blue) and the covered part (dark brown). However, for anomalous triclinic data 180° + 2θmax have to be covered. |
![[Figure 17]](ba0020fig17.jpg)
| BIOLOGICAL CRYSTALLOGRAPHY |
ISSN: 1399-0047
