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XB-ART-60052
Dev Growth Differ 1981 Jan 01;231:41-49. doi: 10.1111/j.1440-169X.1981.00041.x.
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CYCLIC SURFACE CHANGES IN THE NON-NUCLEATE EGG FRAGMENT OF XENOPUS LAEVIS.

Sakai M , Kubota HY .


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Fertilized uncleaved eggs of Xenopus laevis were divided into nucleate and non-nucleate egg fragments. Both fragments, together with the whole egg of the same batch, were observed by time-lapse cinematography. Two kinds of cyclic surface changes, (1) rounding-up and relaxing movements and (2) surface contraction waves, accompanying each cleavage in the whole eggs and the nucleate fragments, were also observed even in the non-nucleate fragments although they do not cleave. Cleavage intervals of the whole egg and the nucleate fragment were nearly equal, but the rounding-up intervals of the non-nucleate fragment were slightly but definitely longer than the cleavage intervals of the nucleate fragment and the whole egg.

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Species referenced: Xenopus laevis