1D3Y:
reference: Structure and function of an archaeal topoisomerase VI subunit with homology to the meiotic recombination factor Spo11., Nichols MD, DeAngelis K, Keck JL, Berger JM, EMBO J 1999 Nov 1;18(21):6177-88. PMID: 10545127

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