| 5SYH: reference: An ionizable active-site tryptophan imparts catalase activity to a peroxidase core., Loewen PC, Carpena X, Vidossich P, Fita I, Rovira C, J Am Chem Soc. 2014 May 21;136(20):7249-52. doi: 10.1021/ja502794e. Epub 2014 May, 7. PMID: 24785434 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).