2YBB:
reference: Arrangement of electron transport chain components in bovine mitochondrial supercomplex I(1)III(2)IV(1)., Althoff T, Mills DJ, Popot JL, Kuhlbrandt W, EMBO J. 2011 Sep 9. doi: 10.1038/emboj.2011.324. PMID: 21909073

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