The P. falciparum (P.f) functional interaction map was superimposed on the genomes of three other apicomplexan species: C. parvum (C.p), T. gondii (T.g), and Plasmodium yoelii (P.y). Numbers in parentheses in the header row indicate the number of orthologs detected by OrthoMCL (Li et al. 2003). These observations can be further refined as coverage and quality of the sequenced genomes improves.