Three-dimensional models of the avian Plasmodium RON2 protein. A) Stereo views of the C-terminus of P. gallinaceum RON2 (left) and P. falciparum RON2 (right). B) Sequence alignment of P. gallinaceum and P. falciparum RON2 are shown with the secondary structure of the corresponding amino acid regions above the alignment. Helices are colored red. The line with connecting arrows indicates disulfide bonds. Conserved amino acids are highlighted in red.