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. 2007 Jul;130(1):71–81. doi: 10.1085/jgp.200709769

TABLE II.

Fitted Parameters for Models in Figs. 6 and 7

10-State Cooperativity Dimer-of-dimers
χ2 16.6 17.0 16.9
Kab [ms−1] 0.0157 0.016 0.0076
Zab [e0] 0.60 0.60 0.625
Vab [mV] −78.2 −78.4 −78.4
c N/A 1.0 N/A
γ [ms−1] 0.40 0.29 0.27
δ [ms−1] 0.40 0.32 1.0
f 1.57 1.55 1.53

The only voltage-dependent transitions in the models are the rates determining the S4 movement: α = Kab exp(−Zab(V − Vab)/kT) and β = Kab exp(+Zab(V − Vab)/kT). The other rates are all voltage independent.