4FBK:
reference: Structure of Mre11-Nbs1 complex yields insights into ataxia-telangiectasia-like disease mutations and DNA damage signaling., Schiller CB, Lammens K, Guerini I, Coordes B, Feldmann H, Schlauderer F, Mockel C, Schele A, Strasser K, Jackson SP, Hopfner KP, Nat Struct Mol Biol. 2012 Jun 17;19(7):693-700. doi: 10.1038/nsmb.2323. PMID: 22705791

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