Natural selection drives recurrent formation of activating killer cell immunoglobulin-like receptor and Ly49 from inhibitory homologues.

J Exp Med · 2005 · PMC2213150 · PMID 15837816

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did not reach statistical significanceno p-value reported

Although seven of the nine groups analyzed show an excess of synonymous substitutions (d N /d S < 1), for six groups it did not reach statistical significance.

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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.