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Concentration-dependent uptake of a dipeptide (A) and glucose (B) in vesicles prepared from brush-border membranes of small intestine enterocytes (note logarithmic scales). Differences in slopes of regression for dipeptide uptake, F1,37 = 6.20, P = 0.017; for glucose uptake, F1,46 = 3.02, P = 0.089.
