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Synaptic impairment rather than neuronal loss may be the leading cause of cognitive dysfunction in brain aging. Certain small Rho‐GTPases are involved in synaptic plasticity, and their dysfunction is associated with brain aging and neurodegeneration. Rho‐GTPases undergo prenylation by attachment of geranylgeranylpyrophosphate (GGPP) catalyzed by GGTase‐I. We examined age‐related changes in the abundance...
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