While we're still on the subject of good model-building habits and reviewing pitfalls, I've been shocked to download a couple of structures recently that seem to have solvent channels chock full of allegedly ordered water (many "layers" deep, and not exactly at 0.5A resolution). To any new students out there: making Rfree go down a bit by putting a water in every unexplained blob is NOT the same as building a good model! I'm afraid I reviewed one of these (sans coordinates) ... so sorry to the community ... it wasn't obvious from table 1.
        Phoebe

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Phoebe A. Rice
Assoc. Prof., Dept. of Biochemistry & Molecular Biology
The University of Chicago
phone 773 834 1723
fax 773 702 0439
http://bmb.bsd.uchicago.edu/index.html
http://www.nasa.gov/mission_pages/cassini/multimedia/pia06064.html

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