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Confocal laser scanning microscopy of monolayers immunolabelled for OCTN2 transporter (green) is shown. Nuclei were stained with propidium iodide (red). Single XY scans of EpiAirway™ and Calu-3 cultured under ALI conditions for 8d or 21d, as indicated, are shown; XZ sections of the planes are shown on the top. Representative images from three independent experiments are shown. Bar, 10 μm.
