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. 2017 Mar 9;8:56. doi: 10.1186/s13287-017-0495-4

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — CTLA-4 expression correlates with CD25 and CD44 expression in different populations of thymocytes. a CTLA-4 expression in thymocytes of C57BL/6 mice. b CTLA-4 expression data pooled from three independent experiments. c CTLA-4 expression evaluated in CD4⁺CD25^– and CD4⁺CD25⁺ cells. d CTLA-4 expression in CD25⁺ DN cells, according to varying CD44 expression. Data are mean percent of total cells ± SD from three independent experiments. **p < 0.01, ***p < 0.001