Evolutionary rates of the 218 proteins used for phylogenetic inferences. The length of the individual protein trees, i.e. the sum of its branch lengths, served as an approximation for the evolutionary rate. Note that only the proteins of primer taxa (P. falciparum, P. vivax, P. knowlesi, P. yoelii, P. berghei, P. chabaudi, T. gondii, and B. bovis) were considered. See also Additional file 5.