Dear Pranjal, Some measure of a structure's "quality" compared to another is the number of rotamer outliers, bad bond angles, ramachandran outliers and interpenetrating atoms or "clashes" in a given structure. I would suggest using the Molprobity website
http://molprobity.biochem.duke.edu/ run by the Richardson laboratory at Duke University to compare the quality of one structure vs. another. Good luck, Jim On Jul 13, 2010, at 8:40 AM, Pranjal Mahanta wrote: > Dear Sir, > > I am sorry, I have a very basic quarry regarding the PDB structures. How one > can judge the quality of a deposited PDB data set? Suppose,for e.g., two > PDB's have same R-values and have determined at same resolutions with same > completeness. > > > Thanking you, > > > Pranjal