2FCO:
reference: Structure, flexibility, and mechanism of the Bacillus stearothermophilus RecU Holliday junction resolvase., Kelly SJ, Li J, Setlow P, Jedrzejas MJ, Proteins. 2007 Sep 1;68(4):961-71. PMID: 17557334

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