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Acta Crystallogr A. 2003 May;59(Pt 3):228-34. Epub 2003 Apr 25.

Multiparametric scaling of diffraction intensities.

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Department of Biochemistry, University of Texas, Southwestern Medical Center at Dallas, TX 75390-9038, USA.


A novel and general approach to scaling diffraction intensities is presented. The method minimizes the disagreement among multiple measurements of symmetry-related reflections using a stable refinement procedure. The scale factors are described by a flexible exponential function that allows different scaling corrections to be chosen and combined according to the needs of the experiment. The scaling model presented here includes: scale and temperature factor per batch of data; temperature factor as a continuous function of the radiation dose; absorption in the crystal; uneven exposure within a single diffraction image; and corrections for phenomena that depend on the diffraction peak position on the detector. This scaling model can be extended to include additional corrections for various instrumental and data-collection problems.

[Indexed for MEDLINE]

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