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. 2011 Mar 9;6(3):e17850. doi: 10.1371/journal.pone.0017850

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Bao 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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Fluorescence of the invaded cells was read using ULTRA Multifunctional microplate reader (TECAN) at excitation/emission wavelengths of 530/590 nm. Basal level of ABCG2 expression showing relatively higher expression in drug resistant cell lines (C).