4V4Y:
reference: Structural basis for messenger RNA movement on the ribosome., Yusupova G, Jenner L, Rees B, Moras D, Yusupov M, Nature. 2006 Nov 16;444(7117):391-4. Epub 2006 Oct 18. PMID: 17051149

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