Positive selection drives the evolution of rhino, a member of the heterochromatin protein 1 family in Drosophila.

Indeed, the shadow domain had a highly significant deviation from neutrality ( p < 0.01), suggesting that this domain has been subject to strong positive selection ( Table 1 , shadow).

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We also found two windows with dN > dS for the HP1A- encoded hinge with borderline significance ( p- value approximately 0.05), but further detailed analysis including a population study of D. melanogaster and D. simulans, and dN/dS comparisons among several other pairs of closely related Drosophila species (D.

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