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. 2018 Jul 13;9:2704. doi: 10.1038/s41467-018-05039-1

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© The Author(s) 2018

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — Zebrafish hhex mutants lack lymphatic precursors. a–d Whole-mount views of 36 hpf hhex^+/+ and hhex^−/− embryos immunostained for Prox1 (arrowheads point to Prox1⁺ endothelial cells in the PCV). e Quantification of the number of Prox1⁺ endothelial cells across three somites (from two field of view per embryo) in hhex^+/? (n = 8) and hhex^−/− (n = 6). f–i Whole-mount views of 36 hpf Tg(prox1a:TagRFP); hhex^+/+ and hhex^−/− embryos. hhex mutants exhibit a strong decrease in the number of RFP⁺ cells in the PCV compared to hhex^+/+ (arrowheads point to RFP⁺ endothelial cells in the PCV). j Quantification of the number of RFP⁺ endothelial cells across three somites (from two field of view per embryo) in hhex^+/? (n = 10) and hhex^−/− (n = 4). Values represent means ± s.e.m. ***P ≤ 0.001, and **P ≤ 0.01 by t-test. Scale bars: 50 μm