Requirements for promoter activity in mouse oocytes and embryos distinguish paternal pronuclei from maternal and zygotic nuclei.


Fertilization of mouse eggs produces a 1-cell embryo containing both a paternal and maternal pronucleus. These two nuclei combine during the first mitosis to form the zygotic nuclei of 2-cell embryos. This transition is accompanied by the onset of transcription and the decline of maternal mRNA-dependent gene expression. To determine how changes in nuclear… (More)


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