We have identified Alpha-actinin from the electric organ of the Electrophorus electricus, L. It was analysed by polyacrylamide gel electrophoresis, and identified by immunoblotting. This protein was also found in a membrane fraction of the electric organ enriched with components of the cytoskeleton. Our results suggest that this protein might play a role either in the organization of the microfilaments or its interactions with the membrane to maintain a polarized electrocyte.
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