I'm currently using Procheck* to check a protein backbone. The process is:

  1. Determine backbone phi, psi, and omega angles
  2. Compare to known angle distributions to identify outliers, and angles in disallowed regions

Is Whatcheck** equivalent for this task?

*, checks the stereochemical quality of a protein structure, producing a number of PostScript plots analysing its overall and residue-by-residue geometry. It includes PROCHECK-NMR for checking the quality of structures solved by NMR.

**, Derived from a subset of protein verification tools from the WHATIF program (Vriend, 1990), this does extensive checking of many sterochemical parameters of the residues in the model.


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