| 1A2U: reference: Mobile unnatural amino acid side chains in the core of staphylococcal nuclease., Wynn R, Harkins PC, Richards FM, Fox RO, Protein Sci 1996 Jun;5(6):1026-31. PMID: 8762134 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).