2ZQE:
reference: Crystal structure of MutS2 endonuclease domain and the mechanism of homologous recombination suppression., Fukui K, Nakagawa N, Kitamura Y, Nishida Y, Masui R, Kuramitsu S, J Biol Chem. 2008 Nov 28;283(48):33417-27. Epub 2008 Oct 6. PMID: 18838375

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