Fig. 2.

Cytoplasmic mixing in the early stages of Drosophila blastoderm development. An early stage Drosophila syncytial blastoderm. A band of actin-myosin contractility near the center of the developing blastoderm creates cytoplasmic mixing that redistributes the nuclei based on dispersion physics. Left inset shows the contraction of the actin-myosin network that provides the force to mix the cytoplasm, whereas the right inset shows the relaxation of the actin-myosin network that correlates with stationary nuclei.