| 5N6Y: reference: The structure of vanadium nitrogenase reveals an unusual bridging ligand., Sippel D, Einsle O, Nat Chem Biol. 2017 Sep;13(9):956-960. doi: 10.1038/nchembio.2428. Epub 2017 Jul , 10. PMID: 28692069 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).