3CJH:
reference: The Tim8-Tim13 complex has multiple substrate binding sites and binds cooperatively to Tim23., Beverly KN, Sawaya MR, Schmid E, Koehler CM, J Mol Biol. 2008 Oct 24;382(5):1144-56. Epub 2008 Jul 30. PMID: 18706423

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