3UC1:
reference: Mechanisms For Defining Supercoiling Setpoint By DNA Gyrase Orthologs II. The shape of the GyrA CTD is not a sole determinant for controlling supercoiling efficiency., Tretter EM, Berger JM, J Biol Chem. 2012 Mar 28. PMID: 22457352

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