2PUR:
reference: Specificity versus catalytic potency: The role of threonine 44 in Escherichia coli dihydrodipicolinate synthase mediated catalysis., Dobson RC, Perugini MA, Jameson GB, Gerrard JA, Biochimie. 2009 Aug;91(8):1036-44. Epub 2009 Jun 6. PMID: 19505526

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