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Correlation between WHAT_CHECK Z-score cutoffs for structures and the percentage of these structures that give correct results (♦) or wrong results (▪) when the local ID criteria are used to identify the proton donor. (▴) The total number of structures that fulfill the cutoff criteria. (a) 1st generation packing quality, (b) 2nd generation packing quality, (c) Rotamer normality score, (d) Ramachandran plot appearance, (e) Backbone conformation score, (f) the sum of all Z-scores.
