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Actin and myosin
Actin Filaments
Actin is a contractile protein fibers present in muscles.It occurs in two forms a.monomeric G actin b. polymeric F ACTIN.
Actin was discovered by Straub in 1942.
Actin
Actin is a globular molecule
Actin Changes ShapeApexMyosin binds to ActinAPEX
Assuming you meant microfilament, it is mostly comprised of linear polymers of actin, or actin filaments. Some use "actin filament" (or sometimes just "actin") and "microfilament" interchangably.
Actin
Actin is thin, pulled together by myosin.
Actin Changes ShapeApexMyosin binds to ActinAPEX