David R Castañeda-Castellanos1
& Arnold R Kriegstein2
1
David R. Castañada-Castellanos is in the Departments of Neurology and Physiology and Cellular Biophysics, Columbia University, New York, New York, USA.
2
Arnold R. Kriegstein is in the Departments of Neurology and Pathology and the center for Neurobiology and Behavior, Columbia University, New York, New York, USA. ark17@columbia.edu
Numb is an important developmental protein that functions in fate determination, differentiation and cell maturation, but its role in mammalian neural progenitors has been controversial. A new paper uses a clever approach to attempt to reconcile the opposing views.
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