2FTC:
reference: A structural model for the large subunit of the Mammalian mitochondrial ribosome., Mears JA, Sharma MR, Gutell RR, McCook AS, Richardson PE, Caulfield TR, Agrawal RK, Harvey SC, J Mol Biol. 2006 Apr 21;358(1):193-212. Epub 2006 Feb 10. PMID: 16510155

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