xia2: an expert system for macromolecular crystallography data reduction

An expert system for macromolecular crystallography data reduction is presented, which builds on existing software to automate the complete data reduction process from images to merged structure factor amplitudes. This can automatically identify multi-wedge, multi-pass and multiwavelength data sets and includes explicit procedures to test for crystallographic special cases. With the push towards high-thoughput crystallography at synchrotron beamlines and automation of structure solution, the ability to reduce data with no user input fills an important gap in the pipeline.