6EML:
reference: Cryo-EM structure of a late pre-40S ribosomal subunit from Saccharomyces cerevisiae., Heuer A, Thomson E, Schmidt C, Berninghausen O, Becker T, Hurt E, Beckmann R, Elife. 2017 Nov 20;6. doi: 10.7554/eLife.30189. PMID: 29155690

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