2ZKQ:
reference: Structure of the Mammalian 80S Ribosome at 8.7 A Resolution., Chandramouli P, Topf M, Menetret JF, Eswar N, Cannone JJ, Gutell RR, Sali A, Akey CW, Structure. 2008 Apr;16(4):535-48. PMID: 18400176

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