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[Investigation of the functional properties of domains of alpha-actinin].

The role of domains in rabbit skeletal muscle alpha-actinin was investigated. The binding center of alpha-actinin containing F-actin is localized in the N-terminal domain, while the C-terminal domain provides for dimerization of the protein molecule. A model of structural organization of the alpha-actinin was proposed, according to which the subunits within the molecule are oriented so that the N-terminal domains localized on the opposite sides of the protein molecule form the binding centers of alpha-actinin with F-actin.