Dear Mattia, You can make a density map from atomic structures (or their parts) in Chimera using the "molmap" command: <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/molmap.html> For example, commands: open 2gbp molmap ligand 4.5 molmap protein 5 ... would make a map of resolution 4.5 for the ligand part of the structure (glucose) and another map of resolution 5 for the protein part of the structure. You could also specify the whole structure, particular chains, etc. If the SAXS model was in the form of a PDB file with the beads as "atoms," perhaps you could use a similar procedure. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On May 4, 2011, at 7:44 AM, Mattia Rocco wrote:
To the developers of Chimera: is there any intention of implementing the uploading of imgCIF density maps files? Such files can be generated by RasMol starting from either atomic structures or low-resolution bead models (e.g. SAXS-derived models).
Conversely, it would be nice if density maps could be generated within Chimera...
Best - Mattia