2HDB:
reference: A structural limitation on enzyme activity: the case of HMG-CoA synthase., Steussy CN, Robison AD, Tetrick AM, Knight JT, Rodwell VW, Stauffacher CV, Sutherlin AL, Biochemistry. 2006 Dec 5;45(48):14407-14. PMID: 17128980

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