4ICD:
reference: Regulation of isocitrate dehydrogenase by phosphorylation involves no long-range conformational change in the free enzyme., Hurley JH, Dean AM, Thorsness PE, Koshland DE Jr, Stroud RM, J Biol Chem 1990 Mar 5;265(7):3599-602. PMID: 2406256

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