The somites are embryonic elements that give rise to the muscles, skeleton and some skin layers of the trunk. They form in a symmetrical fashion, but to do so they must be shielded from asymmetrical cues.
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Hornstein, E., Tabin, C. Asymmetrical threat averted. Nature 435, 155–156 (2005). https://doi.org/10.1038/435155a
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DOI: https://doi.org/10.1038/435155a
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