A cation channel that opens in response to binding by extracellular glutmate, but only if glycine or D-serine is also bound and the membrane is depolarized. Voltage gating is indirect, due to ejection of bound magnesium from the pore at permissive voltages. [GOC:mah, PMID:10049997, PMID:7790891]
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C5: Ontology GO: Gene Ontology GO:MF: GO Molecular Function