2HJI:
reference: One protein, two enzymes revisited: a structural entropy switch interconverts the two isoforms of acireductone dioxygenase., Ju T, Goldsmith RB, Chai SC, Maroney MJ, Pochapsky SS, Pochapsky TC, J Mol Biol. 2006 Nov 3;363(4):823-34. Epub 2006 Aug 26. PMID: 16989860

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