[phenixbb] Scaling for Isomorphous Difference Maps

Nathaniel Echols nechols at lbl.gov
Thu Sep 20 00:00:30 PDT 2012

On Wed, Sep 19, 2012 at 4:17 PM, Michael Thompson <miket at chem.ucla.edu> wrote:
> I'm currently using the GUI to calculate some Fo-Fo isomorphous difference maps. From looking at the Phenix documentation, it hasn't become apparent to me if the tool that performs this calculation automatically scales the two sets of amplitudes to one another, or if the input mtz files need to be scaled together elsewhere before running the map utility.

Yes, the second dataset will be scaled to the first.  A word of
caution: take a close look at the R-factors that it prints out after
scaling; if these are unreasonably high, your datasets are not really


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