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Postsynaptic effects: activates enzyme calcium-calmodulin kinase II (CaM-kinase II) Phosphorylates itself -> Remains activated. Induces more non-NMDA receptors in post-synaptic membrane (increase in epsp).
Presynaptic: captivates enzyme which produces nitric oxide (gas), which reaches presynaptic nerve terminal (retrograde messenger). Enhances neurotransmitter release.