4E1U:
reference: Crystal structure of Delta-[Ru(bpy)(2)dppz](2)(+) bound to mismatched DNA reveals side-by-side metalloinsertion and intercalation., Song H, Kaiser JT, Barton JK, Nat Chem. 2012 Jun 10;4(8):615-20. doi: 10.1038/nchem.1375. PMID: 22824892

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