2Q9U:
reference: The O2-scavenging flavodiiron protein in the human parasite Giardia intestinalis., Di Matteo A, Scandurra FM, Testa F, Forte E, Sarti P, Brunori M, Giuffre A, J Biol Chem. 2008 Feb 15;283(7):4061-8. Epub 2007 Dec 12. PMID: 18077462

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