Comparison of the co-expression gene data between species. a) bivariate correlations (see Figure 2) between zebra mussel data and the different model species shown in Figure 8. b) clustering analysis (see Figure 3). Only gene pairs with 2 the highest correlations and/or lowest distance values are considered. Distance values are represented as reciprocals in b). Green cells with plus signals indicate correlations also observed for the corresponding model species; pink cells with minus signals indicate otherwise. N/A in a yellow background indicates non-applicable interspecies correlations.