Cortical F-actin in live embryos: wild-type vs aura mutants. Left: In wild-type, cortical F-actin exhibits dynamic cyclical changes and local undulations. Movie corresponds to still data in Fig. 6A. Representative movie of 10 trials. Right: In aura mutants, cortical F-actin appears static and exhibits an aberrant reorganization. Movie corresponds to still data in Fig. 6B. Representative movie of 10 trials. In both movies, F-actin is detected by the Life Act transgene, with images at 200x magnification, corresponding to scale bar in Fig. 6.