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. 2020 Nov 18;21:302. doi: 10.1186/s12931-020-01568-w

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© The Author(s) 2020

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. 1 — Distinct expression profiles for receptors and epithelial progenitors in normal and hypoplastic lungs. a Examples of representative blots are shown for each protein analyzed. Western blot analysis of b ROBO1; c ROBO2; d SOX2; and e SOX9 relative expression levels in normal (ctrl) and hypoplastic (hyp) lungs at selected gestational ages from E13.5-to-E21.5. Each lane represents a pooled-tissue sample, and relative expression was determined against β-Tubulin. Semi-quantitative analysis of three independent experiments for each protein is plotted (n ≥ 9 per timepoint and experimental groups, respectively). Results are presented as mean ± SEM. Symbols indicate the main effects and non-redundant interactions of the two-way ANOVA. p < 0.05: ^αvs. ctrl; ^βvs. E13.5- and 15.5-ctrl; ^Ψvs E13.5- and E15.5-hyp; ^γvs E15.5-ctrl; ^µvs E15.5-hyp; ^λvs E17.5-ctrl; ^εvs E17.5-hyp; ^δvs E19.5-hyp