3L7Z:
reference: Crystal structure of the S. solfataricus archaeal exosome reveals conformational flexibility in the RNA-binding ring., Lu C, Ding F, Ke A, PLoS One. 2010 Jan 15;5(1):e8739. PMID: 20090900

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