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Definition. Protein characteristic of the postsynaptic membrane. In a chemical synapse, the postsynaptic membrane is the membrane that receives a signal (binds neurotransmitter) from the presynaptic cell and responds via depolarisation or hyperpolarisation. The postsynaptic membrane is separated from the presynaptic membrane by the synaptic cleft.
any receptor which resides upon the cell membrane or inside a postsynaptic neuron. Interaction with an effector substance, dispersed by the presynaptic neuron or from another site, begins a series of biochemical occurrences. POSTSYNAPTIC RECEPTOR: The postsynaptic receptor is failing to respond even when directly prompted..