EpitheliumBarrett EsophagusMetaplasiaEpithelial CellsEpithelium, CornealEsophagusCactaceaeSeminiferous EpitheliumIntestinal MucosaGoblet CellsImmunohistochemistryRetinal Pigment EpitheliumMicroscopy, ElectronPrecancerous ConditionsMucous MembraneRespiratory MucosaOlfactory MucosaMucinsKeratinsTracheaCell DifferentiationEsophageal DiseasesMicroscopy, Electron, ScanningBronchiHyperplasiaIntestine, SmallAlcian BlueIn Situ HybridizationIntestinesNasal MucosaMorphogenesisEsophageal NeoplasmsHistocytochemistryGene Expression Regulation, DevelopmentalColonCorneaOptic Lobe, NonmammalianCardiaEsophagoscopyCiliaAdenocarcinomaRNA, MessengerDigestive SystemBiopsyGastric MucosaCervix UteriCells, CulturedBreast DiseasesOrgan Culture TechniquesMucusMucin-2Ciliary BodyEsophagogastric JunctionVisual CortexJejunumHomeodomain ProteinsMicrovilliPaneth CellsIntercellular JunctionsMice, TransgenicKeratin-7Cell PolarityKeratin-8Basement MembraneDuodenumMice, Inbred C57BLConjunctivaSignal TransductionImmunoenzyme TechniquesCystsTime FactorsCarcinoma, Intraductal, NoninfiltratingLungStomachCell CountGastroesophageal RefluxSomatosensory CortexUterusCell DivisionEsophageal StenosisVibrissaeCell ShapeHarderian GlandFluorescent Antibody TechniqueCatsBreastAnimals, NewbornGene ExpressionStem CellsDominance, OcularReverse Transcriptase Polymerase Chain ReactionRabbitsEndodermCystadenomaRegenerationVaginaCell ProliferationVisual PathwaysAutoradiographyMice, Knockout