glutamate-gated receptor activity NMDA glutamate receptor activity GO:0004972 The name of this receptor comes from its selective activation by N-methyl-D-aspartate (NMDA). Note that this term represents an activity and not a gene product. NMDA receptor 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. molecular_function N-methyl-D-aspartate selective glutamate receptor activity Wikipedia:NMDA_receptor voltage-gated monoatomic ion channel activity