Tables for
Volume F
Crystallography of biological macromolecules
Edited by M. G. Rossmann and E. Arnold

International Tables for Crystallography (2006). Vol. F, ch. 11.5, p. 237


C. G. van Beek,a R. Bolotovskya§ and M. G. Rossmanna*

aDepartment of Biological Sciences, Purdue University, West Lafayette, IN 47907-1392, USA
Correspondence e-mail:

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Hierarchy of criteria for selecting reflections for scaling and averaging procedures

Methods 1 and 2
All parts of a reflection are rejected if:
(1) There are no successfully integrated parts.
(2) There are no parts with significant intensity (for scaling only).
(3) There are some parts entering and some parts exiting the Ewald sphere (this implies that the reflection is too close to the rotation axis and is partly in the blind zone).
(4) This is a full reflection recorded only once with no other symmetry-equivalent observations.
Method 1 Method 2
All parts of a reflection are rejected if: Any part of a reflection is rejected if:
(1) There is a part that is not successfully integrated. (1) The calculated partiality is less than a chosen value.
(2) There is a part that has a significant intensity, but is not predicted by the crystal orientation and mosaicity used in the scaling program. (2) The intensity is less than a chosen fraction of the error estimate.
(3) The sum of calculated partialities differs from unity by more than a chosen value.