5I56:
reference: Structural Basis for Negative Allosteric Modulation of GluN2A-Containing NMDA Receptors., Yi F, Mou TC, Dorsett KN, Volkmann RA, Menniti FS, Sprang SR, Hansen KB, Neuron. 2016 Sep 3. pii: S0896-6273(16)30506-2. doi:, 10.1016/j.neuron.2016.08.014. PMID: 27618671

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