Synonymous and nonsynonymous site diversity values in the exons of A. lyrataAly13 sequences of sets A and B, showing the two different kinds of sequences. The Nei-Gojobori (1986) measure of sequence distances was used. Due to the primers used, exons 1 and 7 are incomplete. The numbers of nucleotide sites analyzed in each exon are given in tables 4 and 5