Catalogues of mammalian long noncoding RNAs: modest conservation and incompleteness.

Genome Biol · 2009 · PMC3091318 · PMID 19895688

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highly significantP < 10 -15actually significant

These differences in substitution rates between exonic and AR sequences are highly significant ( P < 10 -15 , two-sided Mann-Whitney (MW) test) and are consistent with a fraction of the ncRNA exons having evolved under selective constraint.

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