1XGE:
reference: Dihydroorotase from Escherichia coli: Loop Movement and Cooperativity between Subunits., Lee M, Chan CW, Mitchell Guss J, Christopherson RI, Maher MJ, J Mol Biol 2005 May 6;348(3):523-33. PMID: 15826651

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