3IMQ:
reference: Fine tuning of the E. coli NusB:NusE complex affinity to BoxA RNA is required for processive antitermination., Burmann BM, Luo X, Rosch P, Wahl MC, Gottesman ME, Nucleic Acids Res. 2009 Oct 23. PMID: 19854945

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