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Dear Tommi, I'm not sure whether 'test data sets part I' relates to the query I mailed the other day but, in light of the recent posts regarding fundamental literature, your suggestion seems an excellent one. Perhaps I'm not looking in the right places, but finding examples of image sets exhibiting e.g., radiation damage, crystal slippage, autoindexing failures or any of the aberrations shown in Phil Evans' excellent scala tutorial seems difficult. Likewise for examples of good and bad final-refinement maps. Making primary/intermediate data available would benefit both students and algorithm comparison/validation (e.g. measuring performance on standard data sets is routine in data-visualization/image-processing papers). Tommi Kajander wrote: > Also, i think that would be nice if this type of info could be put on > the web, part of the wiki for instance.. > if there is some consensus to what works + the typical proteins > easily available. > > Tommi Kajander, Ph.D. > Structural Biology and Biophysics > Institute of Biotechnology > University of Helsinki > Viikinkaari 1 > (P.O. Box 65) > 00014 Helsinki > Finland > p. +358-9-19158903 > [log in to unmask] -- Alastair Fyfe Graduate Student Biomolecular Engineering Dept. University of California, Santa Cruz