msp-7 gene family phylogeny inferred by Maximum Likelihood (A) and Bayesian (B) methods for P. vivax and two closely related species. The coloured branches show the MSP-7E (red), MSP-7F (green) and MSP-7L (blue) sequences. Sequence clustering reflects orthologous relationships between the msp-7 genes from these three species. The P. falciparum MSP-7F (PfalH) sequence was used as outgroup. Numbers over the branches are bootstrap and probability values.