2VDC:
reference: The subnanometer resolution structure of the glutamate synthase 1.2-MDa hexamer by cryoelectron microscopy and its oligomerization behavior in solution: functional implications., Cottevieille M, Larquet E, Jonic S, Petoukhov MV, Caprini G, Paravisi S, Svergun DI, Vanoni MA, Boisset N, J Biol Chem. 2008 Mar 28;283(13):8237-49. Epub 2008 Jan 16. PMID: 18199747

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