Two analyses of human eggs, sperm and early-stage embryos reveal a pronounced loss of DNA methylation — a molecular modification that affects gene transcription — after fertilization. See Letters p.606 & p.611
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Reik, W., Kelsey, G. Cellular memory erased in human embryos. Nature 511, 540–541 (2014). https://doi.org/10.1038/nature13648
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DOI: https://doi.org/10.1038/nature13648
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