Hi folks,

The WHATIF server found the following issue in evaluating a protein structure.

Structure Z-scores, positive is better than average:

chi-1 / chi-2 rotamer normality  :  -7.278         (bad             (  -3.8,  
1.6) )


RMS Z-scores, should be close to 1.0:

Improper dihedral distribution :     2.025         (loose)


Does anyone have a suggestion of what can be done for example 
in Coot or Refmac5 to improve or fix these results?


Many thanks
Ray Brown

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