Cellulose synthase activation domains CSAD

Figure 11-1. The cellulose synthase life cycle. After being inserted into the plasma membrane within a cellulose synthase activation domain (CSAD located between the red circles at the time of deposition) the synthase moves with an average speed w within the plasma membrane, leaving a cellulose microfibril in its wake. The direction of motion and hence the angle the deposited CMF mals s with the cell axis is determined by the local density of other synthases. The CMF synthase becomes inactive after a characteristic lifetime which determines the length of the microfibrils The CSAD itself, here shown in grey, moves with a speed v in the direction opposite to that of the CMF synthases (See Color Plate of this figure beginning on page 355)...

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