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We have previously shown that estradiol causes a twofold rise in dendritic spine density in cultured rat hippocampal neurons, as it does in vivo. More recently, estrogen receptors have been localized to aspiny inhibitory hippocampal interneurons, indicating that their effect on spiny pyramidal neurons may be indirect. We therefore examined the possibility(More)
We expressed in Escherichia coli the vaccinia virus gene for a protein similar to vertebrate profilins, purified the recombinant viral profilin, and characterized its interactions with actin and polyphosphoinositides. Compared with cellular profilins, this viral profilin has a low affinity (Kd > or = 35 microM) for human platelet actin monomers, a weak(More)
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