Hi Kenneth,
There are recognized advantages to including riding hydrogens during refinement, even at low resolution. Others have written on this better than I could (the following link is a post to the CCP4bb from the archives):
http://www.ysbl.york.ac.uk/ccp4bb/2002/msg01215.html
-Andy Torelli
-----Original Message-----
From: CCP4 bulletin board [mailto:[log in to unmask]] On Behalf Of Kenneth A. Satyshur
Sent: Thursday, January 06, 2011 11:16 PM
To: [log in to unmask]
Subject: [ccp4bb] Do carbon scattering include hydrogen
Persons of interest:
I understood that refinements in refmac of low res structures without hydrogens includes a component of the Hydrogen atom attached to the carbon in the carbon scattering factors. Or is this just if the Hydrogen atoms
are in the riding position. If so, why bother to add hydrogens in the riding position.
Thanks
kas
--
Kenneth A. Satyshur, M.S.,Ph.D.
Associate Scientist
University of Wisconsin
Madison, Wisconsin 53706
608-215-5207
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