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. 2009 May 15;1(2):51–59. doi: 10.1007/s12551-009-0008-5

Table 1.

Elastic bending and twisting parameters for native actin and cofilactin filamentsa

Filament Lp (pN nm)b κ (pN μm2)b I (nm4)b Eapp (pN nm-2)b C (pN μm2 rad-1)c
Actin 9.8 (± 0.14) 40 (± 0.49) × 10-3 120 330 2.30 (± 1.00) × 10-6
Cofilactin 2.2 (± 0.026) 9.1 (± 0.11) × 10-3 240 38 0.13 (± 0.06) × 10-6

aConditions: 20 mM imidazole (pH 6.6), 25°C, 50 mM KCl, 0.2 mM ATP, 2 mM MgCl2, 2 mM DTT, 1 mM NaN3

b The values of the filament persistence length (Lp) flexural stiffness (κ), shape-dependent geometric moment of inertia (I) and apparent elastic Young’s modulus (Eapp) are taken from McCullough et al. (2008)

c The values of the filament torsional stiffness (C) are taken from Prochniewicz et al. (2005)