. 2007 May 8;104(20):8544–8549. doi: 10.1073/pnas.0701224104

Table 1.

Parameters of microtubule dynamic instability

	Leading ends			Lagging ends
	Wild type	tua5^D251N	tua4^S178Δ	Wild type	tua5^D251N	tua4^S178Δ
Growth rate, μm/min	4.68	2.80^*	7.46^*	1.48	1.56	2.31^*
Shrinkage rate, μm/min	11.53	6.90^*	11.91	5.50	1.49^*	6.36
Catastrophe frequency, events/sec	0.086	0.083	0.092	0.174	0.189	0.203
Rescue frequency, events/sec	0.152	0.177	0.143	0.145	0.146	0.107
Time spent, growth	76.8%	63.4%	52.2%	9.1%	14.7%	8.4%
Pause	9.1%	15.4%	9.8%	46.2%	55.4%	56.9%
Shrinkage	14.0%	21.2%	38.0%	44.7%	30.0%	34.7%
Dynamicity, μm/min	4.89	2.65^*	8.41^*	1.89	0.45^*	1.56

Wild type, n = 20 and t = 2,444 sec; tua5^D251N, n = 10 and t = 1,260 sec; tua4^S178Δ, n = 10 and t = 1,228 sec.

*Statistically significant difference from wild type (P < 0.05).