Nodal gene expression in a chick embryo

  • Jerome Collignon
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Nodal gene expression in a chick embryo. Jerome Collignon. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.

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Stage 8 chick embryo showing that the nodal gene is active on the left hand side of the embryo and in the node. This gene has been implicated in the rotation of the embryo and is necessary for the correct looping of the heart. The purple stain shows where the nodal mRNA is present.

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