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. 2019 Apr 3;20:5. doi: 10.1186/s12860-019-0185-4

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© The Author(s). 2019

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. 1 — a Senescence associated β-Galactosidase expression in DFC_S and DFC_F before (passages 9) and after the induction of cellular senescence (DFC_F: passage 20 or DFC_S passage 21). b β-Galactosidase activity in DFC_S and DFC_F at a low passage and a high passage (DFC_F: passage 21 or DFC_S passage 22). The enzyme activity was calibrated to the activity of β-Galactosidase in DFC_S. *: p < 0,05