A mirror-symmetric cell division that orchestrates neuroepithelial morphogenesis

In the developing neural tube of the zebrafish, a newly discovered kind of cell division occurs that produces two daughter cells with mirror symmetry. Cells are polarized in mirror symmetry on either side of the neural midline, and Pard3, a protein known to be involved in polarized cell divisions, is deposited within the cleavage furrow of the midline.