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XB-ART-26436
Exp Cell Res 1989 Nov 01;1851:271-6.
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Cytostatic factor (CSF) in the eggs of Xenopus laevis.

Moses RM , Masui Y .


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Cytostatic factor (CSF) in unfertilized egg cytoplasm causes metaphase arrest when microinjected into zygotes. This was originally described in Rana pipiens eggs In Xenopus laevis, CSF has also been demonstrated. but only when the calcium-chelating agent, EGTA, was injected into the egg cytoplasm. In the present study, however, CSF was demonstrated in Xenopus eggs when donor egg activation was prevented by treatment with CO2 and Mg2+ instead of by EGTA, and recipient blastomere degeneration was prevented by increasing the KCl in the surrounding medium.

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