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. 2013 Jan 14;8(1):e53991. doi: 10.1371/journal.pone.0053991

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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A,B, ventral view of 48 hpf embryos. A, whole-mount in situ hybridization for oxtl mRNA in a 48 hpf embryo. B, GFP expression visualized with epi-fluorescence in a 48 hpf Tg(oxtl:GFP) embryo. Epi-fluorescent and differential interference contrast (DIC) images are overlaid. The oxtl expressing cells are indicated with arrowheads.