5MCJ:
reference: OH cleavage from tyrosine: debunking a myth., Bury CS, Carmichael I, Garman EF, J Synchrotron Radiat. 2017 Jan 1;24(Pt 1):7-18. doi: 10.1107/S1600577516016775., Epub 2017 Jan 1. PMID: 28009542

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