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. 2012 Sep 12;7(9):e44776. doi: 10.1371/journal.pone.0044776

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© 2012 Huber et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A: Quantitative analysis of the intracellular fluorescence intensity of eFluxx-ID Gold in native and in transduced Pgp-GFP-hCMEC/D3 cells in the absence or presence of 20 µM verapamil. B: The multidrug resistance activity of Pgp-GFP-hCMEC/D3 cells is increased by a factor of 2 compared to nontransduced cells, which was determined by calculating the multidrug resistance factor for each probe.