1HJR:
reference: Atomic structure of the RuvC resolvase: a holliday junction-specific endonuclease from E. coli., Ariyoshi M, Vassylyev DG, Iwasaki H, Nakamura H, Shinagawa H, Morikawa K, Cell 1994 Sep 23;78(6):1063-72. PMID: 7923356

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