| 4KCC: reference: Conformational Analysis of NMDA Receptor GluN1, GluN2, and GluN3 Ligand-Binding Domains Reveals Subtype-Specific Characteristics., Yao Y, Belcher J, Berger AJ, Mayer ML, Lau AY, Structure. 2013 Oct 8;21(10):1788-99. doi: 10.1016/j.str.2013.07.011. Epub 2013, Aug 22. PMID: 23972471 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).