Average identity of monomers in AS layers.

The mean identity of monomers in pairwise comparisons within each array (upper line), standard deviation (middle line), and the number of monomers are indicated for each AS layer, as depicted in Figure 2. In cases where two domains of the same color are present on one chromosome arm, figures for both of them are presented separately; multiple red arrays in 8q are presented summarily. In cases marked by an asterisk, only 1,000 monomers were used in comparisons. In the two bottom lines, the mean of each column representing the identity across a whole layer and the mean identity obtained in “between layers” comparisons (this layer to all the others) are presented. It can be seen that the intra-array divergence and hence the age of the arrays decrease towards the centromere.