Another set of cells to illustrate that the dynamics of Rab11 endosomes in HD striatal cells declines and is enhanced upon the expression of dominantly active Rab11, as in Fig. 3 . Boxed regions were enlarged and shown below the corresponding frame. Arrows in Insets trace motile structures containing both XK-EGFP and mCherry-Rab11/dArab11, whereas arrowheads point to structures changing in their size. Dashed circles indicate motile structures containing both XK-EGFP and mCherry-Rab11/dArab11 disappearing in the following images, and dashed polygons identify those appearing in the following images. Enlarged dashed contours indicate dynamic changes in the morphology of large tubulovesicular structures, likely reflecting events of vesicle fusion and budding. Scale bars in the last frame of each of SThdhQ7/Q7, SThdhQ111/Q111, and SThdhQ111/Q111 + dArab11: 10 μm (upper), 2 μm (middle), and 0.5 μm (lower).