2RD5:
reference: Structural Basis for the Regulation of N-Acetylglutamate Kinase by PII in Arabidopsis thaliana., Mizuno Y, Moorhead GB, Ng KK, J Biol Chem. 2007 Dec 7;282(49):35733-40. Epub 2007 Oct 3. PMID: 17913711

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