Predicted expected run time (A) and length (B) spent before dissociating from a microtubule for VLE RNA. The length of the segment extending up corresponds to the time or distance for movement up a MT toward the nucleus, and the length of the segment extending down corresponds to the time or distance for movement down a MT toward the vegetal cortex. Purple, blue, and red correspond to Regions 1, 2, and 3, respectively, as in Fig. 2A; yellow corresponds to nocodazole-treated oocytes. To see this figure in color, go online.