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Effects of RA and BMP2 on the levels of GDNF and neurturin mRNA levels in cultured Schwann cells. Schwann cells were treated with 10−7m RA and/or 10 ng/ml BMP2 for 4 d. Levels of GDNF and neurturin mRNAs were measured by RT-PCR. Each column represents the mean and range of two independent RNA samples. Each panel is representative of two independent experiments that gave similar results.
