At the onset of mammalian X-chromosome inactivation, the X chromosomes are counted and then a choice is made about which one to inactivate. New findings provide evidence that a transient physical association between X chromosomes in the nucleus might be involved in this process.
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Morey, C., Bickmore, W. Sealed with a X. Nat Cell Biol 8, 207–209 (2006). https://doi.org/10.1038/ncb0306-207
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DOI: https://doi.org/10.1038/ncb0306-207
