Notes from NEET topper
Actin:
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Actin is a thin filamentous protein that is a key component of the cytoskeleton in eukaryotic cells.
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In muscle cells, actin forms long, helical filaments by polymerizing globular actin monomers (G-actin).
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These actin filaments are arranged in a repeating pattern within muscle fibers, called sarcomeres, which are the basic contractile units of muscles .
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Actin filaments have binding sites where myosin can attach during muscle contraction.
