> 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 <
[log in to unmask]> 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
>>
>
