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Comparison of the mRNA levels of neuronal biomarkers expressed in N2a cells cultured on TCPS and [RGD-V6]20in the presence or absence of RA. GAPDH mRNA was used as an internal standard. All the data are expressed as fold increase relative to the value obtained with TCPS without RA. * and # correspond to P < 0.05 and P < 0.01 compared to RGD-/RA- data, respectively.
