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Kinetic parameters of kinesin steps. Mean±s.e.m. T=25°C. *Rate constants for the biochemical transition (kc) are described by: kc= 1/τc, where τc is the time constant of the load-independent transition in Fig. 2b.
| [ATPlim] (=10 μM) | [ATPsat] (=1 mM) | |||
|---|---|---|---|---|
|
| ||||
| kζ0 (s−1) | dζ (nm) | kζ0 (s−1) | dζ (nm) | |
| Forward step (f) | 106±8 | 2.7±0.1 | 528±49 | 2.6±0.1 |
| Backward step (b) | 0.39±0.04 | 0.0±0.1 | 1.81±0.17 | 0.1±0.1 |
| Detachment (d) | 0.05±0.01 | −1.8±0.2 | 0.18±0.03 | −1.2±0.1 |
| Biochemical* (c) | 212±28 | N/A | 207±13 | N/A |
