6ES9:
reference: Structural basis for substrate specificity of methylsuccinyl-CoA dehydrogenase: an unusual member of the acyl-CoA dehydrogenase family., Schwander T, McLean R, Zarzycki J, Erb TJ, J Biol Chem. 2017 Dec 22. pii: RA117.000764. doi: 10.1074/jbc.RA117.000764. PMID: 29275330

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