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Effects of BMP4 on regulations of Ras-ERK pathway and Tuj1 in NSCs. (A-B) NSCs were grown in the bFGF-containing medium (10 ng/ml). (A) The cells were transfected with 2 µg of pcDNA3.0 or pcDNA3.0-BMP4 in a 60 mm dish. (B) The cells were treated with 20 ng/ml of recombinant BMP4 together with or without 150 ng/ml of recombinant noggin.
