Figure 3

Fig. 3. Random walk analysis of MT dynamics during the approach to steady-state. The behavior of plus ends of MTs away from the cell margin was analyzed in terms of a diffusion plus drift model. (A) Drift component. Mean displacement of plus ends versus time. Regression line provides drift coefficient of 3.3+-0.4 µm/min. (B) Diffusion component. Mean square displacement about drift regression line (variance of displacement) of the same plus ends versus time. Regression line provides diffusion coefficient of 6.3+-0.9 µm2/min. Dashed lines, 70% confidence intervals. Data obtained from 33 MTs in 7 cells.