title: Osmotic stress is the main determinant of the diameter of the actin filament.
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.
authors.affiliation: Istituto di Chimica Biologica, Università di Ferrara, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Grazi
authors.forename: C
authors.initials: C
authors.lastname: Schwienbacher
authors.forename: E
authors.initials: E
authors.lastname: Magri
mesh_terms: D000199:Actins / Q000737:chemistry* / Q000302:isolation & purification; D000818:Animals; D009132:Muscles; D009997:Osmotic Pressure; D011817:Rabbits; D013314:Stress, Mechanical; D014335:Tropomyosin / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000199:Actins; D014335:Tropomyosin