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XB-ART-28591
Dev Biol 1986 Aug 01;1162:539-42.
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Formation of nucleus-like structure in the cytoplasm of lambda-DNA-injected fertilized eggs and its partition into blastomeres during early embryogenesis in Xenopus laevis.

Shiokawa K, Sameshima M, Tashiro K, Miura T, Nakakura N, Yamana K.


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The fate of bacteriophage lambda-DNA was examined after injection into the fertilized eggs of Xenopus laevis. Injection of a large amount of lambda-DNA (ca. 24 ng) into a fertilized Xenopus egg induced the formation around the injected DNA of a giant nucleus-like structure which was surrounded by an apparently normal bilayered nuclear membrane with nuclear pore complexes. Southern blot analysis revealed the persistence of injected lambda-DNA until the blastula stage. The nucleus-like structure was partitioned into blastomeres during cleavage through a process of nuclear fission, and was maintained in a group of extraordinarily large blastomeres until the blastula stage.

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