jzhu at idi.harvard.edu
Thu Feb 28 10:11:03 PST 2013
Is there a way in phenix to do what I wanted, i.e. calculate the real space cc between a model and a SA omit map? Thanks.
On Feb 28, 2013, at 12:56 PM, Pavel Afonine <pafonine at lbl.gov> wrote:
> Hi Jianghai,
> when you run
> phenix.real_space_correlation m.pdb d.mtz
> it will calculate and output map correlation coefficients (map CC) between two maps: map_1=Fmodel map and map_2=2mFo-DFmodel, where Fmodel = k_total * (Fcalc + Fbulk), and 2mFo-DFmodel is what's called sigmaa map. These maps are calculated using the model from input PDB file, and reflection data (Fobs or Iobs) and R-free-flags from input reflection file.
> You can define map_1 and map_2.
> Depending on data resolution, the map CC will be reported per individual atom or per entire residue.
> On 2/27/13 1:17 PM, Jianghai Zhu wrote:
>> Hi All,
>> I was trying to use "phenix.real_space_correlation *.pdb resolve_composite_map.mtz" to get some real space cc for my ligand against the SA composite omit map. But I am not sure that the map used here was the SA composite omit map. Will phenix use the omit map I provided or will it just simply calculate a sigmaA weighted 2Fo-Fc map based on the pdb?
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