3UVF:
reference: Expanding LAGLIDADG endonuclease scaffold diversity by rapidly surveying evolutionary sequence space., Jacoby K, Metzger M, Shen BW, Certo MT, Jarjour J, Stoddard BL, Scharenberg AM, Nucleic Acids Res. 2012 Feb 14. PMID: 22334611

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