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  • Title: Osmotic stress is the main determinant of the diameter of the actin filament.
    Author: Grazi E, Schwienbacher C, Magri E.
    Journal: Biochem Biophys Res Commun; 1993 Dec 30; 197(3):1377-81. PubMed ID: 8280155.
    Abstract:
    The diameter of the actin filament is influenced by osmotic stress, being 9.0 nm at 1 x 10(5) dynes/cm2 and 6.8 nm at 9.00 x 10(6) dynes/cm2. At 1.81 x 10(5) dynes/cm2, the protein osmotic pressure in frog muscle, the diameter is 7.95 nm. The diameter of the tropomyosin-decorated actin filament is also influenced by osmotic stress even though, at the low pressures (up to 2 x 10(5) dynes/cm2), the decorated filament is significantly more resistant to compression than the undecorated actin filament.
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