3ENJ:
reference: Structure of pig heart citrate synthase at 1.78 A resolution., Larson SB, Day JS, Nguyen C, Cudney R, McPherson A, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2009 May 1;65(Pt, 5):430-4. Epub 2009 Apr 24. PMID: 19407370

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