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BMP4 promotes the differentiation of astrocytes in cerebellar cultures. A–D, Images of GFAP staining in cells prepared at P6 and grown for 3 d in the absence or presence of increasing concentrations of BMP4. Similar effects were observed in cultures prepared at P10. A, Control. B, A total of 1 ng/ml BMP4. C, A total of 5 ng/ml BMP4.D, A total of 10 ng/ml BMP4.
