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Transepithelial resistance (TER) of HGEC. HGEC cultured on polycarbonate filters were untreated and exposed to CdtABC for 18 hrs. No increase in the TER of either culture was detected over a 120-hour period. Cultures of untreated and CdtABC-treated MDCK cells reached a TER of approximately 1,800 Ω x cm2 by 30 hrs of incubation. This experiment was performed twice.
