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. 2011 Aug 26;18(1):67. doi: 10.1186/1423-0127-18-67

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Copyright ©2011 Zeng et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Expression of epicardial cell marker Tbx18 in murine embryonic heart. Tbx18 was found not only in the epicardium (arrowheads) but also in the VS and LV from E10.5 to at least E14.5 (arrow), and Tbx18 was also found in the RV at E14.5 (arrow) (a-d). a2, b2, c2, and d2 are higher-magnification views (400×) of a1, b1, c1, and d1 (200×), respectively, and highlight sections from the VS. a3, b3, c3, and d3 are sections from the LV (200×), and a4, b4, c4, and d4 (200×) are sections from the RV. VS, ventricular septum; LA/RA, left/right atrium; LV/RV, left/right ventricle.