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. 2003 May;84(5):3155–3167. doi: 10.1016/S0006-3495(03)70040-X

TABLE 1.

Key model parameters
Inline graphic Second-order binding constant of myosin to actin
A Chain kink energy for one bound myosin
ν Persistence number = 1/ξc
Associated parameters, variables, and constants
α Strength of the chain confining potential
κ Chain bending stiffness per unit length (see under Eq. 1)
ξ Inverse persistence length = (α/4κ)1/4
φ+ Myosin kink angle (>0)
δφ Angular standard deviation of free chain = (8βκξ3)−1/2
n Hill coefficient
s Distance along the chain
[S1] Free myosin concentration
KS1 First-order myosin affinity to actin Inline graphic
K Myosin affinity under the chain = KS1exp(−βA)
θ Myosin bound fraction (of actin sites with myosin bound)
φ(s) Angular displacement of the chain at position s
c Actin monomer spacing (5.5 nm)
kB Boltzmann's constant
T Absolute temperature
β =1/kBT

Definitions of mathematical symbols appearing outside the Theory section. In this article, ln and log denote logarithms to base e and 10 respectively.