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. 2017 May 10;8:14995. doi: 10.1038/ncomms14995

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) H2A.J and Ki-67 co-localization in sections of human skin of the indicated ages by immunofluorescent staining. H2A.J showed mutually exclusive staining with the Ki-67 proliferation marker. (b) H2A.J and 53BP1 foci increase in aging human epidermis. Arrows indicate positively-stained nuclei. A quantification of positive cells for three biological replicates is shown below the immunofluorescence images, and the one-sided Mann–Whitney U-test was used to determine the statistical significance (*P<0.05, **P<0.01). Error bars represent mean±s.e.