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Hi Pranjal, you can use POLYGON tool for this: Crystallographic model quality at a glance. L. Urzhumtseva, P. V. Afonine, P. D. Adams, A. Urzhumtsev Acta Cryst. D65, 297-300 (2009) Essentially, what it does is it compares your structure with all similar structures in PDB and gives your the result as a colored picture. What is "similar" - you define, but the default is good in most cases. It is available as part of Comprehensive Validation module of PHENIX. Pavel. On 7/13/10 5:40 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