6QEQ:
reference: Enterococcal PcfF Is a Ribbon-Helix-Helix Protein That Recruits the Relaxase PcfG Through Binding and Bending of the oriT Sequence., Rehman S, Li YG, Schmitt A, Lassinantti L, Christie PJ, Berntsson RP, Front Microbiol. 2019 May 7;10:958. doi: 10.3389/fmicb.2019.00958. eCollection, 2019. PMID: 31134011

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