XtalView program

XtalView This is another excellent program for model building. It is available at http //www.sdsc.edu/ CCMS/Packages/XTALVIEW/xtalview.html. 

The PDB format, for better or worse, is the standard for macromolecular coordinate files. The handling of residues with alternate conformations and the chain id versus segment id distinction may cause small problems. Density map formats are much less standardized. Fortunately, the mapman program from Uppsala can convert between many, but not all, types of maps. To convert to the fsfour format (which can be read, but not written by MAPMAN) for XtalView, the cns2fsfour available from San Diego is recommended. Coot uses the... 

McRee, D. E. (1999). XtalView/Xfit-a versatile program for manipulating atomic coordinates and electron density. /, Struct. Biol. 125,156-165. 

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