Figure 3.

The relationship between intron fragment GC content and both divergence and length. (a) The relationship between GC content of intron fragments and divergence between D. melanogaster and D. simulans (Spearman correlation coefficient R_s = -0.345, P < 10^-4). (b) The relationship between GC content of intron fragments and intron length (R_s = 0.237, P < 10^-3).