4V9P:
reference: Control of ribosomal subunit rotation by elongation factor G., Pulk A, Cate JH, Science. 2013 Jun 28;340(6140):1235970. doi: 10.1126/science.1235970. PMID: 23812721

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