Figure 7
Intron phase and conservation of splice sites. A. Percentage of identical intron phases (0:0, 1:1, 2:2), and different phases (0:1, 0:2, 1:2) in a set of paired conserved genes with conserved introns (N = 251) versus a set of non-conserved genes (N = 1231). Both sets had identical splice sites, having 2–10 residues in common (cf. Fig. 5) while only the conserved set also showed homology in the rest of the sequence. Conserved was defined as those sequences that have 6 or more identical residues in the general homology region. B. Distribution of intron phase between conserved (N = 217) and non-conserved (N = 723) genes in the sets of identical phases shown in A.