highly significantp <0.0001
For human genes, highly significant differences were found between G1 and G2 (F = 1.29; p <0.0001), G1 and G3 (F = 1.33; p <0.0001), or G1 and G4 exons (F = 1.33; p <0.0001), while none was found between G2 and G3 (F = 1.04; p = 0.4254), G2 and G4 (F = 1.03; p = 0.4285), or G3 and G4 exons (F = 1.00; p = 0.9243).