2QF7:
reference: Domain architecture of pyruvate carboxylase, a biotin-dependent multifunctional enzyme., St Maurice M, Reinhardt L, Surinya KH, Attwood PV, Wallace JC, Cleland WW, Rayment I, Science. 2007 Aug 24;317(5841):1076-9. PMID: 17717183

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