Molecular cloning and characterization of a diapause-specific peptide in the beet armyworm, Spodoptera exigua

► Mature SeDSP consists of 40 amino acid residues including 6 cysteines. ► SeDSP is expressed in the epidermis of both S. exigua larvae and pupae. ► SeDSP was constitutively expressed in the epidermis after molting and metamorphosis. ► Recombinant SeDSP shows antibacterial activity against Bacillus megaterium.