Hello Jian--

> You are right, there are large violations. I'm confused about the
> values that should be used in the CS and DC tables.  Our
> experimental collaborators have given us a table of the CS values
> (let's call it Set 1), but another computational collaborator uses
> the value that is subtracted by the isotropic value, 119.3 ppm for
> non-Glycine residues (let's call this Set 2. In this table, each
> value is the corresponding value from Set 1 minus 119.3).  It seems
> strange for me that when Set 1 was used, the structures look OK, but
> with huge violations for CS; when Set 2 was used, the structure look
> strange but violations are small. What do you think might be the
> problem?

You might check out

http://nmr.cit.nih.gov/xplor-nih/doc/current/python/ref/csa-methods-marvin.pdf

(referenced from)
http://nmr.cit.nih.gov/xplor-nih/doc/current/python/ref/csaPotTools.html

> Do the simulation parameters in refine.py matter much?  Is
> there a script specifically designed for membrane proteins?

please see eginput/assignFit/02refine.py in the Xplor-NIH
distribution for an example.

I hope this helps--
Charles

--
Charles Schwieters     email:   [email protected]
                       www:     http://schwieters.org/cds
phone: (301) 402-4914  PGP key: http://schwieters.org/cds/pgp.txt

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