6EF2:
reference: Substrate-engaged 26S proteasome structures reveal mechanisms for ATP-hydrolysis-driven translocation., de la Pena AH, Goodall EA, Gates SN, Lander GC, Martin A, Science. 2018 Oct 11. pii: science.aav0725. doi: 10.1126/science.aav0725. PMID: 30309908

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