Delta sleep inducing peptide (DSIP) is a nonapeptide which was isolated from the rabbit brain. It is synthesized in the hypothalamus and is present in small amounts in the blood. Synonyms: DSIP; Emideltide; Sleep inducing peptide; Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu Molecular Formula: …