Paralytic peptides

Paralytic peptides are a family of short (23 amino acids) insect peptides that halt metamorphosis of insects from larvae to pupae. These peptides contain one disulphide bridge. The family includes growth-blocking peptide (GBP) of "Mythimna separata" (Oriental armyworm) and the paralytic peptides from "Manduca sexta" (tobacco hawkmoth), "Heliothis virescens" (noctuid moth), and "Spodoptera exigua" (beet armyworm) as well as plasmatocyte-spreading peptide (PSP1).