1XJF:
reference: Structural mechanism of allosteric substrate specificity regulation in a ribonucleotide reductase., Larsson KM, Jordan A, Eliasson R, Reichard P, Logan DT, Nordlund P, Nat Struct Mol Biol 2004 Nov;11(11):1142-9. Epub 2004 Oct 10. PMID: 15475969

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