. Author manuscript; available in PMC: 2010 Aug 9.

Published in final edited form as: Biophys Rev. 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 filaments^a

Filament	L_p (μm)^b	κ (pN μm²)^b	I (nm⁴)^b	E_app (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

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

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

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