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Effective permeability (Peff) of 0.1 μM [3H]fMet-Leu-Phe during intestinal perfusions of wild-type and PepT1 knockout mice. Studies were performed in pH 6.5 buffer with 100 mM unlabeled Phe (n = 6, mean ± SE). Groups with different letters were statistically different as determined by one-way ANOVA and Tukey’s test.
