1F76:
reference: E. coli dihydroorotate dehydrogenase reveals structural and functional distinctions between different classes of dihydroorotate dehydrogenases., Norager S, Jensen KF, Bjornberg O, Larsen S, Structure. 2002 Sep;10(9):1211-23. PMID: 12220493

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