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. 2021 Jun 25;22:472. doi: 10.1186/s12864-021-07741-9

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 2 — Principal component analysis (PCA) of lncRNAs (A) and mRNAs (C). Boxplot of the expression levels of 906 DE lncRNAs (B) and 2193 DE mRNAs (D). The abscissa is the sample name, the ordinate is the log₁₀(FPKM + 1), and the boxplot of each area includes five statistics (from top to bottom: maximum, upper quartile, median, lower quartile and minimum)