 It has also been suggested that Dpp plays a role in regulating the growth and size of tissues.Flies with mutations in decapentaplegic fail to form these structures correctly, hence the name ("decapenta"-, fifteen, -"plegic", paralysis).Dpp is the Drosophila homolog of the vertebrate bone morphogenetic proteins (BMPs), which are members of the TGF-β superfamily, a class of proteins that are often associated with their own specific signaling pathway.