6N1P:
reference: CryoEM structures of open dimers of Gyrase A in complex with DNA illuminate mechanism of strand passage., Soczek KM, Grant T, Rosenthal PB, Mondragon A, Elife. 2018 Nov 20;7. pii: 41215. doi: 10.7554/eLife.41215. PMID: 30457554

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