1SSM:
reference: Structure of serine acetyltransferase in complexes with CoA and its cysteine feedback inhibitor., Olsen LR, Huang B, Vetting MW, Roderick SL, Biochemistry 2004 May 25;43(20):6013-9. PMID: 15147185

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