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. 2010 Sep 3;5(9):e12564. doi: 10.1371/journal.pone.0012564

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Cheung 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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The expression of MDR-1 in KB, KB-L30 and KB-VIN10 cells was analyzed by RT-PCR (A). The expression of MRP-1 in KB, KB-L30 and KB-20a cells was analyzed by real-time PCR (B). GAPDH was used as an internal control in both RT-PCR and real time PCR analyzes.