TABLE 2.
Tension (P0), stiffness (Y∞), and parameters of exponential processes
| Parameters | Units | Type I* | Type IIA | Type IID | Type IIB |
|---|---|---|---|---|---|
| P0 | kPa | 150 ± 20 | 157 ± 7 | 157 ± 7 | 157 ± 4 |
| Y∞ | MPa | 8.6 ± 0.7 | 10.0 ± 0.8 | 9.2 ± 0.6 | 8.9 ± 0.3 |
| P0/Y∞ | %L0 | 1.74 ± 0.23 | 1.63 ± 0.10 | 1.77 ± 0.05 | 1.80 ± 0.04 |
| H | MPa | 0.75 | 2.0 ± 0.1 | 1.4 ± 0.1 | 1.1 ± 0.1 |
| A | MPa | 3.90 | 9.2 ± 0.7 | 7.0 ± 0.5 | 6.0 ± 0.2 |
| B | MPa | 5.55 | 7.9 ± 0.7 | 7.6 ± 0.6 | 7.7 ± 0.2 |
| C | MPa | 7.94 | 6.7 ± 0.5 | 8.5 ± 0.6 | 9.4 ± 0.3 |
| 2πa | s−1 | 1.90 | 4.4 ± 0.4 | 5.50 ± 0.16 | 6.48 ± 0.15 |
| 2πb | s−1 | 4.11 | 21 ± 2 | 85 ± 2 | 168 ± 6 |
| 2πc | s−1 | 26.1 | 238 ± 16 | 596 ± 23 | 813 ± 19 |
| 2πfmin | s−1 | 6 | 62.3 ± 2.6 | 196 ± 3 | 305 ± 5 |
| N | – | 7 | 9 | 26 | 43 |
| †Vu | s−1 | 0.72 | 1.46 | 2.25 | 2.45 |
These values were obtained at the standard activating condition (5 mM MgATP, 8 mM Pi) at 20°C. The mean ± SE and the number of experiments (number of fiber preparations) are shown by N.
*
From Wang and Kawai (21) except for Vu.
†
From Andruchov et al. (15) given in fiber length per second; the data were obtained at 22°C in the absence of added Pi, pCa 4.5.