5TW1:
reference: Structure and function of the mycobacterial transcription initiation complex with the essential regulator RbpA., Hubin EA, Fay A, Xu C, Bean JM, Saecker RM, Glickman MS, Darst SA, Campbell EA, Elife. 2017 Jan 9;6. pii: e22520. doi: 10.7554/eLife.22520. PMID: 28067618

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