[2ME2] (μmol/L) | ||||||||
---|---|---|---|---|---|---|---|---|

0 | 4 | 20 | 50 | |||||

Parameter | ||||||||

Growth rate (μm/min) | 0.52 ± 0.06 | 0.43 ± 0.03 | 0.3 ± 0.03 | 0.23 ± 0.02 | ||||

Growth length (μm) | 1.3 ± 0.2 | 1.2 ± 0.2 | 0.8 ± 0.1 | 0.8 ± 0.1 | ||||

Shortening rate (μm/min) | 28.0 ± 3.4 | 26.5 ± 3.9 | 18.3 ± 4.2 | * | ||||

Shortening length (μm) | 6.9 ± 0.8 | 4.4 ± 0.8 | 4.7 ± 0.8 | 1.4 ± 0.9 | ||||

Catastrophe frequency (min^{−1}) | 0.16 ± 0.05 | 0.13 ± 0.04 | 0.10 ± 0.03 | 0.02 ± 0.01 | ||||

Rescue frequency (min^{−1}) | 0.9 ± 0.5 | 1.4 ± 0.7 | 0.6 ± 0.3 | 0.4 ± 0.2 | ||||

Dynamicity (μm/min) | 1.5 | 1.1 | 0.57 | 0.14 | ||||

Percentage (%) of time spent: | ||||||||

Growing | 88.6 | 84.4 | 73.9 | 51.3 | ||||

Shortening | 4.2 | 4.0 | 5.0 | 3.7 | ||||

Paused | 7.2 | 11.6 | 21.2 | 45.0 |

NOTE: Values in bold are significant at ≥99% confidence interval by Student's

*t*test. Catastrophe and rescue frequency and dynamicity are calculated from the population of microtubules and thus statistical analysis cannot be done on these variables.↵* Shortening events were rare at this concentration and, thus, the shortening rate could not be accurately calculated.