For the group of differentially expressed and hypermethylated genes above the minimum methylation cut-off, we ran a binomial test to probe for a significant trend towards down- or up-regulation.
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Hepatic gene body hypermethylation is a shared epigenetic signature of murine longevity.
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The sentences
Given that the global methylome remained unchanged, these overlaps were highly significant (each: p < e -16 , Fisher’s exact test), strongly indicating that their co-occurrence was not due to chance.