| 5FLH: reference: Quercetin 2,4-Dioxygenase Activates Dioxygen in a Side-On O2 -Ni Complex., Jeoung JH, Nianios D, Fetzner S, Dobbek H, Angew Chem Int Ed Engl. 2016 Mar 1;55(10):3281-4. doi: 10.1002/anie.201510741., Epub 2016 Feb 5. PMID: 26846734 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).