1Y4A:
reference: Role of the intramolecular hydrogen bond network in the inhibitory power of chymotrypsin inhibitor 2(,)., Radisky ES, Lu CJ, Kwan G, Koshland DE Jr, Biochemistry 2005 May 10;44(18):6823-30. PMID: 15865427

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).