Table 2.
Kinetic parameters of the tension responses to the flash photolysis of ATP from 2 mm DMB-caged ATP in the presence of Ca2+
| Kinetic component | Rate constant (s−1)a | Normalised amplitudeb | |
|---|---|---|---|
| Fast tension relaxation, k1 and a1 | 119 ± 25 (48), | 95 ± 5 | 0.35 ± 0.88 |
| r = 0.36 | r = −0.45 | ||
| Fast tension rise, k2 and a2 | 28.3 ± 8.7 (43), | 28.8 ± 2.2 | 0.53 ± 0.24 |
| r = −0.005 | r = −0.56 | ||
| Slow tension rise, k3 and a3 | 5.8 ± 1.6 (43), | 5.7 ± 0.3 | 0.54 ± 0.07 |
| r = −0.44 | r = −0.25 | ||
| Slow tension decrease, k4 and a4 | 0.33 ± 0.2 (48) | 0.46 ± 0.17 | |
| r = 0.16 | r = −0.45 | ||
Values are means ±s.d.
a
Numbers in parentheses are the number of the tension responses used for the analysis; the second (right-hand) set of values is the value calculated from the averaged time course.
b
The amplitudes were normalised to the maximal active tension reached after the flash. r is the correlation coefficient with the flash number.