5CSC:
reference: Crystal structure of an open conformation of citrate synthase from chicken heart at 2.8-A resolution., Liao DI, Karpusas M, Remington SJ, Biochemistry 1991 Jun 18;30(24):6031-6. PMID: 2043641

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