Evolutionary conservation of membrane transport proteins (rows) of the malaria parasite, Plasmodium falciparum, in different eukaryotic species (columns). The degree of evolutionary conservation (dot size and color) indicates proteins that are putative drug targets (image by January Weiner 3rd and Taco W.A. Kooij, Radboud University, The Netherlands); image modified by MIC. The cover is published under the Creative Commons Attribution (CC BY) license.