Summary
DNA synthesis has been studied in chick embryos age between 2 and 10 days, using labelling with tritiated thymidine and stripping film autoradiography. The observations made earlier in the literature on a premitotic migration of the nuclei in the neural epithelium have been verified. In young stages (before day 7) peripherally migrated cells do not synthesize DNA, but after day 7 such a synthesis occurs. In spite of this, few mitoses are seen. The interpretation of these facts is discussed.
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The costs of this investigation were defrayed by grants from the Swedish Medical Research Council, the Medical Faculty of Lund, and the Royal Physiographic Society.
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Källén, B., Valmin, K. DNA synthesis in the embryonic chick central nervous system. Z. Zellforsch. 60, 491–496 (1963). https://doi.org/10.1007/BF00331179
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DOI: https://doi.org/10.1007/BF00331179