Feb. 15, 2023
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Stylized depiction of an activated NMDA receptor. Glutamate is shown in the glutamate-binding site and glycine is shown in the glycine-binding site. The allosteric site, which modulates receptor function when bound to a ligand, is not occupied. NMDA receptors require the binding of two molecules of glutamate or aspartate and two of glycine. (Creative Commons Attribution-Share Alike 3.0 Unported license.)