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Histology of the jejunum during fasted conditions in wild-type (+/+) mice (a, b) and Pept1 knockout (-/-) mice (c, d). Sections were stained with hematoxylin and eosin, and examined by light microscopy. In (a) and (c), the bar = 1 mm; in (b) and (d), the bar = 100 μm.
