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Effect of luminal perfusion with l-Glu and/or IMP on the release of GIP, GLP-1, or GLP-2 into PV. PV blood was collected before and after luminal perfusion of l-Glu (10 mM), IMP (0.1 mM), or both. Plasma concentration of GIP (A), GLP-1 (B), or GLP-2 (C) was measured. Each data point represents mean ± S.E.M. (n = 6 rats). *, p < 0.05 versus pH 7.0 Krebs group. †, p < 0.05 versus l-Glu group.
