Many forms of LTP involve insertion of new postsynaptic AMPA receptors. Plant et al. now report transient insertion of Ca2+-permeable AMPA receptors after LTP induction, and find their activation is required for LTP maintenance.
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Kauer, J., Malenka, R. LTP: AMPA receptors trading places. Nat Neurosci 9, 593–594 (2006). https://doi.org/10.1038/nn0506-593
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DOI: https://doi.org/10.1038/nn0506-593