1A9X:
reference: Carbamoyl phosphate synthetase: caught in the act of glutamine hydrolysis., Thoden JB, Miran SG, Phillips JC, Howard AJ, Raushel FM, Holden HM, Biochemistry 1998 Jun 23;37(25):8825-31. PMID: 9636022

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