The costamere is a structural-functional component of striated muscle cells which connects the sarcomere of the muscle to the cell membrane. Costameres are sub-sarcolemmal protein assemblies circumferentially aligned in register with the Z-disk of peripheral myofibrils. They physically couple force-generating sarcomeres with the sarcolemma in stri...
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http://en.wikipedia.org/wiki/Costamere
<cell biology> Regular periodic sub membranous arrays of vinculin in muscle cells, link sarcomeres to the membrane and are associated with links to extracellular matrix. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
Regular periodic sub-membranous arrays of vinculin in muscle cells; link sarcomeres to the membrane and are associated with links to extracellular matrix.
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