(d) Representative planes of a neural progenitor cell in the ventricular zone (Sox2+, bottom left panel) of an E13.5 mouse brain show that an intracellular MBd (asterisk) is associated with the ventricle-facing daughter in the asymmetrically dividing cell (top row). The bottom row emphasizes the position of paired chromosomes in a dividing anaphase cell. CD133, midbody/MBd marker (green); Na/K-ATPase, cell-border marker (red); DRAQ5, DNA (blue); DAPI, DNA. v, ventricle. Scale bar, 5 μm. Note that abscission occurs apically in these cells. 