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. 2011 Jan 31;6(1):e16515. doi: 10.1371/journal.pone.0016515

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Yan 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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Immunohistochemistry was used to analyze expression of bacterial β-galactosidase in mammary tumors from mice of genotype: A, BK5.ATF3^Tg/0;TOPGAL^0/0 or B, BK5.ATF3^Tg/0;TOPGAL^Tg/0. Arrows, supra-basal tumor cells; asterisks, basal tumor cells.