Correlated Evolution of Nucleotide Positions within Splice Sites in Mammals
Fig 4
Dinucleotide frequencies within the region of periodic correlations (positions (-12, -7)) of PPT.
Observed/expected ratio of dinucleotide frequencies within PPT (positions (-12, -7)) and within adjacent intron. Dinucleotides are ordered by the observed/expected ratio within PPT, from low to high. The expected values were obtained based on mononucleotide content. The significance of the difference between observed/expected ratio within PPTs and within adjacent introns are indicated: * 0.01 < p ≤ 0.05; ** 0.001 < p ≤ 0.01; *** p ≤ 0.001; ns p > 0.05.