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Survival motor neuron protein (SMN) is the determining factor for the human neurodegenerative disease spinal muscular atrophy (SMA). SMN is critical for small nuclear ribonucleoprotein (snRNP) assembly. Using Drosophila oogenesis as a model system, we show that mutations in smn cause abnormal nuclear organization in nurse cells and oocytes. Germline and mitotic clonal analysis reveals that both nurse...
In the chick metencephalon, oligodendrocyte precursors arise in distinct domains of the ventricular zone. During development, the earliest oligodendrocyte precursors appear in the metencephalic ventral ventricular zone adjacent to the midline, consistent with their location in the spinal cord. In contrast to spinal cord, however, distinct domains in the lateral and dorsal metencephalic ventricular...
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