Figure 4.

Phylogenetic tree of Kr-h1 orthologues. A maximum likelihood phylogenetic tree examining the relationship between the BtKR-H1 ortholog and orthologs from 19 other insect taxa, using the conserved zinc finger region (see Additional file 1,2 Fig. S1). Maximum likelihood bootstrap values in percent (1000 replicates) are shown at each node. Branch lengths are from maximum likelihood. Insect orders are indicated to the right. The hemimetabolous insect A. pisum is set as the outgroup to the holometablous insects. B. terrestris and A. mellifera are shown within the Hymenoptera. The GenBank accession numbers and full names of all species can be found in the methods.