Scaling for Isomorphous Difference Maps
Hello All, 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. Any info would be appreciated! Thanks, Mike -- Michael C. Thompson Graduate Student Biochemistry & Molecular Biology Division Department of Chemistry & Biochemistry University of California, Los Angeles [email protected]
phenix.fobs_minus_fobs_map ? F On Sep 19, 2012, at 4:17 PM, Michael Thompson wrote:
Hello All,
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.
Any info would be appreciated!
Thanks,
Mike
-- Michael C. Thompson
Graduate Student
Biochemistry & Molecular Biology Division
Department of Chemistry & Biochemistry
University of California, Los Angeles
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On Wed, Sep 19, 2012 at 4:17 PM, Michael Thompson
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 comparable. -Nat
participants (3)
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Francis E Reyes -
Michael Thompson -
Nathaniel Echols