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Competition between separated parental genomes in fertilized eggs aids development

www.nature.com·5 months ago
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RESEARCH BRIEFINGS 29 April 2026 In fertilized egg cells, the maternal and paternal genomes are enclosed in separate compartments called pronuclei. Experiments in mice reveal that this spatial separation enables parental competition for cytoplasmic factors, which helps to prevent the dysregulation of chemical modifications to DNA-packing proteins and contributes to healthy embryonic development. This is a summary of: Kyogoku, H. et al . Cytoplasmic competition between separate parental pronuclei in zygotes. Nature https://doi.org/10.1038/s41586-026-10417-7 (2026) .…

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