1XU4:
reference: Crystal structure of an ATPase-active form of Rad51 homolog from Methanococcus voltae. Insights into potassium dependence., Wu Y, Qian X, He Y, Moya IA, Luo Y, J Biol Chem 2005 Jan 7;280(1):722-8. Epub 2004 Nov 10. PMID: 15537659

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