[phenixbb] how to generate an isomorphous difference map
pafonine at lbl.gov
Wed May 13 09:27:24 PDT 2015
I infer you are trying to compute (Fobs1-Fobs1, model_phase) Fourier map.
You can do it using command line phenix.fobs_minus_fobs_map or GUI (Maps
-> Isomorphous difference map).
For using in Coot, no need to transform into ccp4 map: Coot can contour
any map at positive and negative levels.
For using in Pymol: convert your map into ccp4 format using
phenix.mtz2map (command line) or GUI (Maps -> FFT map coefficients).
Hope this helps.
On 5/12/15 5:43 AM, crystallogrphy wrote:
> I am trying to generate an isomorphous difference map with phenix GUI.
> I input reflection 1 and 2 with mtz format and a PDB model, I got an
> MTZ format map file. Because I want to load it to coot or pymol with
> negative and positive density, I need to transform this mtz map to
> ccp4 map. However, FFT map cannot work.
> Does any know how can I get a ccp4 format maps with positive or
> negative density?
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