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Cover picture: An electron micrograph depicting a
deuterosome, a unique structure that appears in a
subset of radial glial cells in the mouse brain soon
after birth. It is one of the first signs of the
differentiation of some radial glia into ependymal
cells. These deuterosomes are composed of a core
from which centriole-like immature basal bodies
radiate. These basal bodies then move to the
ventricular surface of the cells and serve as nucleation
centers for cilia. For details, see the article by Spassky
et al. in this issue (pages 10-18).
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