| 4I3A: reference: Volume-conserving trans-cis isomerization pathways in photoactive yellow protein visualized by picosecond X-ray crystallography., Jung YO, Lee JH, Kim J, Schmidt M, Moffat K, Srajer V, Ihee H, Nat Chem. 2013 Mar;5(3):212-20. doi: 10.1038/nchem.1565. Epub 2013 Feb 3. PMID: 23422563 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).