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TGF-beta ligands. Full-length protein sequences were used to construct this maximum likelihood tree of TGF-beta ligands. Protein sequences for mouse (Mm), Drosophila melanogaster (Dm), Tribolium castaneum (Tc), and Apis mellifera (Am) were identified from the previous phylogenetic reconstruction of Van der Zee et al. (2008). Acyrthosiphon pisum (Ap) sequences were curated from Shigenobu et al. (2010) and from NCBI GenBank
