Tight JunctionsClaudinsCell Membrane PermeabilityOccludinClaudin-4Electric ImpedancePermeabilityZonula Occludens-1 ProteinClaudin-1MannitolClaudin-3Intercellular JunctionsCaco-2 CellsTight Junction ProteinsClaudin-5EpitheliumMembrane ProteinsEpithelial CellsIntestinal AbsorptionBiological TransportIntestinal MucosaLoop of HenleCapillary PermeabilitySerous MembraneChloridesNephrocalcinosisTranscytosisAbsorptionDiffusion Chambers, CultureMARVEL Domain Containing 2 ProteinDogsClaudin-2Zonula Occludens-2 ProteinMalpighian TubulesSodiumLLC-PK1 CellsAdherens JunctionsJunctional Adhesion MoleculesKidney Tubules, ProximalBlood-Brain BarrierFreeze FracturingFluorescein-5-isothiocyanateDextransHorseradish PeroxidaseJejunumInulinElectric ConductivityIon TransportPhosphoproteinsLanthanumBacterial TranslocationBiological Transport, ActiveIntestinesBlood-Air BarrierGallbladderCell LineTransendothelial and Transepithelial MigrationCells, CulturedCadherinsBufonidaeRhamnoseExtracellular SpaceEndothelium, VascularColonCadmium RadioisotopesCell PolarityWaterMicroscopy, ElectronEnterocytesBlood-Retinal BarrierSucroseAmilorideEndothelial CellsOpossumsHymenolepisUrotheliumHypercalciuriaGillsCalciumDiffusionIleumMicrovesselsModels, BiologicalMyosin-Light-Chain KinasePerfusionOmasumSubmandibular GlandSodium ChlorideOsmosisKidneyLactuloseFluoresceinMembrane PotentialsMicroscopy, ConfocalAquaporin 5CyclamatesKidney Tubules, CollectingHydrostatic PressureActinsGitelman Syndrome