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Average expression of FABP7 and other chromosome 21 genes (PKNOX1, SOD1 and USP25) in control and DS fetal brains, as detected by real-time PCR. All values are given in arbitrary units and normalized using G3PDH as an endogenous control. The statistical error is also shown. The asterisks indicate that the expression differences between trisomic and disomic brains are statistically significant (Mann–Whitney test, P < 0.05).
