6YLE:
reference: Construction of the Central Protuberance and L1 Stalk during 60S Subunit Biogenesis., Kater L, Mitterer V, Thoms M, Cheng J, Berninghausen O, Beckmann R, Hurt E, Mol Cell. 2020 Aug 20;79(4):615-628.e5. doi: 10.1016/j.molcel.2020.06.032. Epub, 2020 Jul 14. PMID: 32668200

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