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Ca 2+ influx through NMDA receptors (NMDA-Rs) triggers synaptic plasticity, gene transcription, and cytotoxicity, but little is known about the regulation of NMDA-Rs themselves. We used two-photon glutamate uncaging to activate NMDA-Rs on individual dendritic spines in rat CA1 neurons while we measured NMDA-R currents at the soma and [Ca 2+ ] changes in spines. Low-frequency uncaging...
Ras proteins are essential components of signal transduction pathways that control cell proliferation, differentiation, and survival. It is well recognized that the functional versatility of Ras proteins is accomplished through their differential compartmentalization, but the mechanisms that control their spatial segregation are not fully understood. Here we show that HRas is subject to ubiquitin...
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