1XJW:
reference: A Single Amino Acid Substitution in the Active Site of Escherichia coli Aspartate Transcarbamoylase Prevents the Allosteric Transition., Stieglitz KA, Pastra-Landis SC, Xia J, Tsuruta H, Kantrowitz ER, J Mol Biol 2005 Jun 3;349(2):413-23. Epub 2005 Apr 9. PMID: 15890205

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