Cell-Penetrating PeptidesEndocytosisEpithelial CellsEpitheliumCell LineCells, CulturedClathrinRespiratory MucosaDynaminsCell MembraneIntestinal MucosaSignal TransductionProtein TransportArrestinsEndosomesBronchiMicroscopy, ConfocalTransfectionBacterial AdhesionMolecular Sequence DataCoated Pits, Cell-MembraneEpithelium, CornealRNA, MessengerMicroscopy, FluorescenceCaco-2 CellsPhosphorylationAmino Acid SequenceCell PolarityMembrane ProteinsReceptors, Cell SurfaceMammary Glands, AnimalImmunohistochemistry