Presence of detectable components in apicomplexan genomes. Evolutionary relationship is indicated on the left (Escalante and Ayala 1994; Barta et al. 2001). (nd) Not detectable. Sequence sources: Published genomes of P. falciparum, P. yoelii, and C. parvum appear in Gardner et al. (2002), Carlton et al. (2002), and Abrahamsen et al. (2004), respectively; unfinished genomes of P. berghei, P. chabaudi, P. gallinaceum, P. knowlesi, P. reichenowi, E. tenella, and T. annulata are provided by The Pathogen Sequencing Unit, The Wellcome Trust Sanger Institute (http://www.sanger.ac.uk/) and GeneDB (http://www.genedb.org/); draft genome sequence of T. gondii was searched at ToxoDB (http://toxodb.org/).