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Caldesmon, filamin 1, nebulin, villin, plastin, ADF, gelsolin, Dematin, and cofilin are differentially expressed actin binding proteins. Dematin is a bundling protein of the erythrocyte membrane skeleton. Dematin is localized to the spectrin-actin junctions, and its actin-bundling activity is abolished upon phosphorylation by cAMP-dependent protein kinase. It may also play a role in the regulation of cell shape, implying a role in tumorigenesis. Dematin is a trimeric protein containing two subunits of 48 kDa and one subunit of 52 kDa. It is localized to the heart, brain, lung, skeletal muscle, and kidney. The Dematin gene is located on human chromosome 8p21.1, a region frequently deleted in prostate cancer, and mouse chromosome 14.
