5OVT:
reference: Structural characterization of the bacterial proteasome homolog BPH reveals a tetradecameric double-ring complex with unique inner cavity properties., Fuchs ACD, Maldoner L, Hipp K, Hartmann MD, Martin J, J Biol Chem. 2017 Nov 28. pii: M117.815258. doi: 10.1074/jbc.M117.815258. PMID: 29183996

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