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      Is Open Access

      XDS

      research-article
      a , *
      Acta Crystallographica Section D: Biological Crystallography
      International Union of Crystallography
      XDS

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          Abstract

          The paper describes the software package XDS for processing of single crystal diffraction data recorded by the rotation method.

          Abstract

          The usage and control of recent modifications of the program package XDS for the processing of rotation images are described in the context of previous versions. New features include automatic determination of spot size and reflecting range and recognition and assignment of crystal symmetry. Moreover, the limitations of earlier package versions on the number of correction/scaling factors and the representation of pixel contents have been removed. Large program parts have been restructured for parallel processing so that the quality and completeness of collected data can be assessed soon after measurement.

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          Most cited references8

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          Automatic processing of rotation diffraction data from crystals of initially unknown symmetry and cell constants

          W Kabsch (1993)
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            Improved R-factors for diffraction data analysis in macromolecular crystallography.

            The quantity Rsym (also called Rmerge) is almost universally used for describing X-ray diffraction data quality. Here, we prove that Rsym is seriously flawed, because it has an implicit dependence on the redundance of the data. A corrected R-factor, Rmeas, is introduced as the equivalent robust indicator of data consistency. In addition, we introduce Rmrgd an R-factor that reflects the gain in accuracy upon averaging of equivalent reflections, as a useful indicator of the quality of reduced data. These new data quality indicators better reveal the benefits of highly redundant data and should stimulate improvements in data quality through increased merging of data from multiple crystals.
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              On the treatment of negative intensity observations

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                Author and article information

                Journal
                Acta Crystallogr D Biol Crystallogr
                Acta Cryst. D
                Acta Crystallographica Section D: Biological Crystallography
                International Union of Crystallography
                0907-4449
                1399-0047
                01 February 2010
                22 January 2010
                22 January 2010
                : 66
                : Pt 2 ( publisher-idID: d100200 )
                : 125-132
                Affiliations
                [a ]Max-Planck-Institut für Medizinische Forschung, Abteilung Biophysik, Jahnstrasse 29, 69120 Heidelberg, Germany
                Author notes
                Article
                dz5179 ABCRE6 S0907444909047337
                10.1107/S0907444909047337
                2815665
                20124692
                e7bd0414-a7f7-42ac-b8b8-4b8bc8e87410
                © Kabsch 2010

                This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

                History
                : 19 August 2009
                : 09 November 2009
                Categories
                Research Papers

                Microscopy & Imaging
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                Microscopy & Imaging
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