The table lists general information as well as typical values used for the model calculations. In B, all species are assumed to diffuse in myoplasm except for troponin, which is fixed at the location of the thin filament. In C, the site concentrations are referred to the myoplasmic water volume (cf., Baylor et al., 1983); the values of k₊₁, k₋₁, and K_d (= k₋₁/k₊₁) are for Ca²⁺ unless indicated otherwise. The asterisk in C and D denotes that the rates for Ca²⁺-ATP are effective rates in the presence of 1 mM free [Mg²⁺] and that a reduced set of equations involving the effective occupancy of ATP with Mg²⁺ was used for the majority of calculations with ATP included (see materials and methods).