Fig. 4

Phylogenetic reconstruction of nematode homologues to C. elegans TGF-β genes. Branches with less than 50 % bootstrap support have been left unresolved. In red are the three Parastrongyloides/Strongyloides sequences previously annotated as DAF-7. The species codes are as in Fig. 2, including: ANNCA – Ancylostoma caninum; HELPO – Heligmosomoides polygrus; NIPBR – Nippostrongylus brasilensis; PARTR – Parastrongyloides trichosuri; STRST – Strongyloides stercoralis; TELCI – Teladordsagia circumcinta. When monophyletic, the Caenorhabditis species have been collapsed and labelled Caen. The full newick format tree is in Additional file 6: File S3