3WHL:
reference: Structural Basis for Proteasome Formation Controlled by an Assembly Chaperone Nas2., Satoh T, Saeki Y, Hiromoto T, Wang YH, Uekusa Y, Yagi H, Yoshihara H, Yagi-Utsumi M, Mizushima T, Tanaka K, Kato K, Structure. 2014 Mar 25. pii: S0969-2126(14)00070-7. doi:, 10.1016/j.str.2014.02.014. PMID: 24685148

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