Enteroendocrine CellsCholecystokininEndocrine GlandsSecretinGastrointestinal HormonesGastric Inhibitory PolypeptideGlucagon-Like Peptide 1ProglucagonIntestine, SmallEndocrine SystemIncretinsPeptonesProtein HydrolysatesPaneth CellsIntestinal MucosaGlucagon-Like Peptide 2DuodenumIntestinesDigestive SystemBasic Helix-Loop-Helix Transcription FactorsEnterocytesReceptors, G-Protein-CoupledGoblet CellsChromogranin ASerotoninGastrointestinal TractLower Gastrointestinal TractParietal Cells, GastricPylorusColonCell LineageNeurotensinOpossumsNerve Tissue ProteinsMice, TransgenicCell DifferentiationJejunumFatty Acid-Binding ProteinsGlucagonTasteSomatostatinGastrinsSubstance PImmunohistochemistryStomachStem CellsHomeodomain ProteinsInsect HormonesPhenylthioureaAPUD CellsGastric MucosaCell CountGrowth HormoneCell Line