Summary
Neural induction is accompanied by a migration of granules from the organizer to the reacting ectoblast (Brachet). The radioautographs of embryos or explants of amphibians seem to show that such a migration to the induced organs takes place when a marked organizer is grafted in a non-radioactive host.
Substances of high molecular weight (proteins or nucleic acids) diffuse from an organizer tagged either with radioactive glycine or with radioactive orotic acid.
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References
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F. Friedberg etR. M. Eakin, J. exp. Zool.110, 33 (1949).
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Ficq, A. Analyse de l'induction neurale par autoradiographie. Experientia 10, 20–21 (1954). https://doi.org/10.1007/BF02158332
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DOI: https://doi.org/10.1007/BF02158332