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Phenylalanine concentrations in blood and brain. (A) Phenylalanine concentrations in blood (μmol/L) (n = 4–6), and (B) phenylalanine content in the brain (nmol/g) (n = 5–6) of BTBR and C57Bl/6 (B6) wild-type (WT) and phenylketonuria (PKU) mice. *p ≤ 0.05; mean ± SEM.
