5OLK:
reference: Novel ATP-cone-driven allosteric regulation of ribonucleotide reductase via the radical-generating subunit., Rozman Grinberg I, Lundin D, Hasan M, Crona M, Jonna VR, Loderer C, Sahlin M, Markova N, Borovok I, Berggren G, Hofer A, Logan DT, Sjoberg BM, Elife. 2018 Feb 1;7. pii: 31529. doi: 10.7554/eLife.31529. PMID: 29388911

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