Figure 5From: Cross genome phylogenetic analysis of human and Drosophila G protein-coupled receptors: application to functional annotation of orphan receptorsPhylogenetic trees of biogenic amine receptors (clusters 20–24). The mode of deriving phylogenetic trees is as described in Methods and indications are as in the Figure 2 except for the cluster 22, where scale bar indicates a maximum likelihood branch length of 1.0 inferred substitutions per site.Back to article page