Reactivation of the inactive X chromosome in development and reprogramming.

Cell Mol Life Sci · 2013 · PMC3689915 · PMID 23052214

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might be significantno p-value reported

Random XCI has therefore a positive effect on female fitness in placental mammals, which might be significant, as maternal fitness is of critical importance in placental systems [ 13 , 14 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.