| 5UN1: reference: Mechanism of NMDA receptor channel block by MK-801 and memantine., Song X, Jensen MO, Jogini V, Stein RA, Lee CH, Mchaourab HS, Shaw DE, Gouaux E, Nature. 2018 Apr;556(7702):515-519. doi: 10.1038/s41586-018-0039-9. Epub 2018 Apr, 18. PMID: 29670280 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).