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Cholera toxin induces differentiation of C6 malignant glioma cells. (A), morphologic transformation (Original magnification: ×200). C6 cells were incubated with 10 ng/ml cholera toxin for 48 h. (B), Time‐dependent effect of GFAP protein expression. (C), Time‐dependent effect of GFAP mRNA level. C6 cells were incubated with 10 ng/ml cholera toxin for the indicated times.
