Fig. 1.

Phylogenetic analysis of Tep genes. a Phylogenetic analysis of available protostomian Tep sequences. b Phylogenetic analysis of Tep sequences issued from the 12 sequenced Drosophila species. The references for all sequences used to generate the phylogenetic trees are provided in online suppl. table S1 (see also online suppl. fig. S1 for a phylogenetic tree of the species used for the interpretation of the Tep phylogenetic trees). Sequences indicated by an asterisk encode a nonfunctional thioester motif.