3GLM:
reference: An asymmetric model for Na+-translocating glutaconyl-CoA decarboxylases., Kress D, Brugel D, Schall I, Linder D, Buckel W, Essen LO, J Biol Chem. 2009 Oct 9;284(41):28401-9. Epub 2009 Aug 4. PMID: 19654317

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