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Cyclopamine preferentially reduces the number of proliferating Olig2 cells after brain injury. Brains from cyclopamine-treated (CYC) or vehicle-treated (Veh) mice injured 3 d before the animals were killed were used for immunofluorescence with an antibody to PCNA and antibodies to either Olig2 or GFAP. All images taken at 10× magnification.
