3R6Q:
reference: Structural basis for the catalytic mechanism of aspartate ammonia lyase., Fibriansah G, Veetil VP, Poelarends GJ, Thunnissen AM, Biochemistry. 2011 Jul 12;50(27):6053-62. Epub 2011 Jun 20. PMID: 21661762

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