Hi Rakesh, An MTZ file contains structure factors, not a density map. Basically a Fourier transform is needed to get the density map from the structure factors. There is a Chimera feature request (#201) http://plato.cgl.ucsf.edu/trac/chimera/wiki/requests to have Chimera calculate the map from the structure factors. It is not an entirely trivial calculation since symmetry and missing structure factors must be accounted for. Chimera density map features are aimed at electron microscopy rather than x-ray crystallography and Chimera is missing useful features for x-ray maps. For example Chimera will not automatically periodically extend a unit cell map to cover a display molecule as COOT does. For now you'll need to calculate the density map using other software. Tom
Hi,
i am having problems loading electron density files from CCP4 and Phenix. The error message reads "Bad MRC grid size (129737328,-319356160,1145110528)". Please advise.
Cheers Rakesh
Graduate student Dept.of Biochemistry Purdue University