Tom Terwilliger describes how to use the Phenix tool Xtriage to examine crystallographic data for translational NCS and what to do if your crystal has it.
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References:
http://www.ccp4.ac.uk/newsletters/newsletter43/articles/PHZ_RWGK_PDA.pdf
"Xtriage and Fest: automatic assessment of X-ray data and substructure structure factor estimation. P.H. Zwart, R.W. Grosse-Kunstleve, and P.D. Adams CCP4 newsletter Winter, Contribution 7 (2005) "
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Slide presentation by Peter Zwart, author of Xtriage:
https://cci.lbl.gov/~phzwart/slides/zwart_sls_april08.pdf