Protein sequence-based phylogenetic tree. The tree was calculated from the aligned and concatenated sequences of four proteins from the five species indicated. Branch lengths are distances calculated using PAM matrices; bootstrap values are indicated at nodes. The proteins used and (in brackets) the gene name on C. parvum chromosome 6 and the GenBank identifiers for their sequences from P. falciparum, P. yoelii yoelii, S. pombe, and T. gondii, respectively, are as follows: protein disulphide isomerase (56K11, 23612738, 23481103, 19113783, 14494995); glyceraldehyde-3-phosphate dehydrogenase (1MB519, 23509820, 23491258, 19112028, 13377044); heat shock protein 60 (1MB751, 23507957, 23479768, 19113806, 5052052); and protein phosphatase 2b (1MB598, 23612977, 23489838, 19112970, 22535354).
