2QEX:
reference: Negamycin binds to the wall of the nascent chain exit tunnel of the 50S ribosomal subunit., Schroeder SJ, Blaha G, Moore PB, Antimicrob Agents Chemother. 2007 Dec;51(12):4462-5. Epub 2007 Jul 30. PMID: 17664317

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