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Re: [ccp4bb]: Riding Hydrogens



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Oh, and for another discussion on the utility of adding hydrogens
to medium-resolution structures you might want to have a look at
the Richardson lab web pages on model validation.

	http://kinemage.biochem.duke.edu/validation/valid.html

The key notion here is not one of R or R-free, but simply that any
correct structural model for the heavy atoms must leave room for
the attached hydrogens. If there is no room, then something must
be wrong, or at least non-optimal. So adding hydrogens can be 
used as a structure validation tool.

-- 
Ethan A Merritt       merritt@u.washington.edu
Biomolecular Structure Center Box 357742
University of Washington, Seattle, WA 98195
phone: (206)543-1421
FAX:   (206)685-7002