5C0W:
reference: RNA degradation paths in a 12-subunit nuclear exosome complex., Makino DL, Schuch B, Stegmann E, Baumgartner M, Basquin C, Conti E, Nature. 2015 Jul 29. doi: 10.1038/nature14865. PMID: 26222026

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