Amino acid sequence divergence and chromosomal location. Plot of amino acid sequence divergence as a function of the distance to the nearest chromosome end. A. Plasmodium falciparum. B. Theileria annulata. The black lines in both panels (i.e., Pf1-5 in panel A and Ta1-5 in panel B) refer to the combined results from genes with five different levels of lineage specificity and are included as the background reference. Error bars indicate standard errors.