| 3KEG: reference: Role of tyrosine 131 in the active site of paAzoR1, an azoreductase with specificity for the inflammatory bowel disease prodrug balsalazide., Wang CJ, Laurieri N, Abuhammad A, Lowe E, Westwood I, Ryan A, Sim E, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010 Jan 1;66(Pt 1):2-7., Epub 2009 Dec 25. PMID: 20057057 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).