2EWJ:
reference: A molecular mousetrap determines polarity of termination of DNA replication in E. coli., Mulcair MD, Schaeffer PM, Oakley AJ, Cross HF, Neylon C, Hill TM, Dixon NE, Cell. 2006 Jun 30;125(7):1309-19. PMID: 16814717

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