Figure 3.
Time course of actin-acrylodan-tropomyosin-troponin fluorescence changes after dissociation of S1 with ATP. (A) Absence of calcium. The smooth curve is a simulation of Eq. 3 with k5 + k6 = 434/s; k7 + k8 = 7.5/s. (B) Presence of calcium; the fitted curve has k5 + k6 = 375/s. Conditions were the same as in Fig. 1 with a temperature of 9.9°C.