The 2.2 Å resolution structure of the O(H) blood-group-specific lectin I from Ulex europaeus

PROCHECK: a program to check the stereochemical quality of protein structures

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Number Collaborative Computational Project · Acta Crystallographica Section D Biological Crystallography · 1994 · 17.3K citations

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Free R value: a novel statistical quantity for assessing the accuracy of crystal structures

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Accurate bond and angle parameters for X-ray protein structure refinement

Richard A. Engh, Robert Huber · Acta Crystallographica Section A Foundations of Crystallography · 1991 · 2.5K citations

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