4J1O:
reference: Prediction and biochemical demonstration of a catabolic pathway for the osmoprotectant proline betaine., Kumar R, Zhao S, Vetting MW, Wood BM, Sakai A, Cho K, Solbiati J, Almo SC, Sweedler JV, Jacobson MP, Gerlt JA, Cronan JE, MBio. 2014 Feb 11;5(1):e00933-13. doi: 10.1128/mBio.00933-13. PMID: 24520058

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