Why Selection Might Be Stronger When Populations Are Small: Intron Size and Density Predict within and between-Species Usage of Exonic Splice Associated cis-Motifs.

We find in all cases a positive and highly significant Spearman’s rank correlation (INT3_400: 5′ rho = 0.439, P = 0; 3′ rho = 0.123, P = 2.7 × 10 − 31 ; INT3: 5′ rho = 0.070, P = 2.5 × 10 − 13 ; 3′ rho = 0.646, P = 0).

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For the N e .μ estimator S , there may be a weak trend but for others there is no evidence.

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