6B8H:
reference: Atomic model for the dimeric FO region of mitochondrial ATP synthase., Guo H, Bueler SA, Rubinstein JL, Science. 2017 Oct 26. pii: eaao4815. doi: 10.1126/science.aao4815. PMID: 29074581

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