Figure 2.

McDonald-Kreitman test for lncRNA exons and introns. Small intronic sequences (≤86 nt, disregarding the first 6 nt and last 16 nt) were used as a proxy for neutrally evolving sequences. *** P <0.001, ns: not significant.

Haerty and Ponting Genome Biology 2013 14:R49   doi:10.1186/gb-2013-14-5-r49
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