| 1RAS: reference: Crystal structure of a fluorescent derivative of RNase A., Baudet-Nessler S, Jullien M, Crosio MP, Janin J, Biochemistry 1993 Aug 24;32(33):8457-64. PMID: 8357795 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).