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The sub-membraneous region of the postsynaptic neuron is an intricate network of cytoskeletal elements generally known as the postsynaptic density. It is thought that this elaborate cytoskeletal region is critical for receptor targeting, clustering, and efficient signal input. Gephyrin, a 93kDa protein, was identified as a result of its ability to bind to polymerized tubulin (microtubules). Although expressed in all tissues, gephyrin mRNA is found most abundantly in brain. Alternative splicing produces at least five different mRNAs. Gephyrin colocalizes and interacts with the glycine receptor at the postsynaptic density. It is possible that Gephyrin acts as an anchor between the glycine receptor and microtubules.Immunofluorescence, Immunohistochemistry, Immunoprecipitation, Western Blotting
