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. 2014 Feb 11;7(2):1097–1112. doi: 10.3390/ma7021097

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© 2014 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 3. — TGF-β1 activation for subclone 4 MC3T3-E1 cells cultured for 8 and 11 in: (A) 3.6 μM Zn media and (B) 50 μM Zn media, normalized to total protein. A single asterisk (*) indicates a p < 0.01 level of significance while double asterisks (**) indicate a p < 0.05 level of significance.