3MLQ:
reference: Structural basis for the bacterial transcription-repair coupling factor/RNA polymerase interaction., Westblade LF, Campbell EA, Pukhrambam C, Padovan JC, Nickels BE, Lamour V, Darst SA, Nucleic Acids Res. 2010 Aug 11. PMID: 20702425

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