Figure 4From: Duplication and positive selection among hominin-specific PRAME genesPhylogenetic relationships of introns a of human and chimpanzee PRAME homologues, inferred using K > I as a distance metric, and a neighbour-joining tree. Percentage bootstrap support (1000 iterations) is shown on branches where the support was less than 50%. Phylogenetic relationships derived using an alignment of intron b is available as Additional file 3.Back to article page