4G6D:
reference: Promoter-specific transcription inhibition in Staphylococcus aureus by a phage protein., Osmundson J, Montero-Diez C, Westblade LF, Hochschild A, Darst SA, Cell. 2012 Nov 21;151(5):1005-16. doi: 10.1016/j.cell.2012.10.034. PMID: 23178120

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