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Transmission electron micrographs of the Caco-2/HT29-MTX co-culture (at 14 d incubation) used in this study (see online version for colours)
Notes: The abundance of mucus-filled vesicles in the HT29-MTX cells and the development of prominent apical tight junctions. These morphological features are substantiated by the graphical representation of TEER measurements on the right.
