Notes from NEET topper

Actin:

  • Actin is a thin filamentous protein that is a key component of the cytoskeleton in eukaryotic cells.

  • In muscle cells, actin forms long, helical filaments by polymerizing globular actin monomers (G-actin).

  • These actin filaments are arranged in a repeating pattern within muscle fibers, called sarcomeres, which are the basic contractile units of muscles .

  • Actin filaments have binding sites where myosin can attach during muscle contraction.