| 1ME3: reference: Crystal structures of reversible ketone-Based inhibitors of the cysteine protease cruzain., Huang L, Brinen LS, Ellman JA, Bioorg Med Chem 2003 Jan 2;11(1):21-9. PMID: 12467703 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).