Hi Hailiang, to get feeling about how maps may look like at different resolutions do the following learning exercise: download a structure from PDB and compute Fcalc maps at different resolutions:
phenix.fmodel model.pdb high_res=1 phenix.fmodel model.pdb high_res=2 phenix.fmodel model.pdb high_res=3 phenix.fmodel model.pdb high_res=4 phenix.fmodel model.pdb high_res=5 ... phenix.fmodel model.pdb high_res=10 phenix.fmodel model.pdb high_res=20 then load them in Coot and you will get your answer. Pavel. On Wed, Jun 1, 2011 at 4:35 PM, Hailiang Zhang <zhan...@umbc.edu> wrote: > Hi there, > > I have a preliminary question. For very low resolution data, say 10A or > even lower, is the density map supposed to be more like a big envelop > covering the whole molecule, or more like a collection of isolated small > envelops covering small motifs (eg helix as cylinder envelop)? I got the > later one but need to make sure and persuade others I didn't do things > wrong. > > Any references will also be appreciated! > > Thanks! > > Hailiang >
