By the Banger Labs Research Team · Updated June 2026
What is DSIP?
Delta sleep-inducing peptide (DSIP) is an amphiphilic nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu and a molecular weight of approximately 849. It was first isolated by Monnier, Schoenenberger and colleagues in the 1970s from the cerebral venous blood dialysate of rabbits during electrically induced slow-wave sleep, and its structure was confirmed by amino-acid analysis and chemical synthesis. It is classified as an endogenous neuropeptide rather than a synthetic analog of any drug class.
How DSIP is studied
The molecular mechanism of DSIP remains unresolved in the research literature; no specific DSIP gene, precursor protein, or dedicated receptor has been definitively identified. Reported preclinical observations suggest possible interactions with neurotransmitter systems, including modulation of adrenergic transmission and effects on serotonergic, noradrenergic, and GABAergic signaling. In vitro it shows low metabolic stability (a short half-life attributed to aminopeptidase-like degradation), and structure-activity studies indicate that amino-acid substitutions or truncation reduce or abolish measured activity.
Research areas
- Studied in animal models (rabbit, rat, mouse) as a putative modulator of slow-wave/delta-band EEG sleep patterns
- Investigated in neuropharmacology research on adrenergic, serotonergic, and GABAergic neurotransmitter systems
- Examined in preclinical structure-activity relationship (SAR) studies of nonapeptide analogs
- Used as a research probe in studies of peptide stability, enzymatic degradation, and blood-brain-barrier transport
- Studied in experimental models exploring stress-response and neuroprotection-related endpoints
These describe laboratory/preclinical research only. No therapeutic, medical, or efficacy claims are made.
DSIP specifications
Handling & quality
DSIP is held to a ≥ 99% HPLC purity standard with a Certificate of Analysis available per batch. Reconstitute with bacteriostatic water and store refrigerated; handle strictly for research. See reconstitution & storage.
Frequently asked questions
What is DSIP?
Delta sleep-inducing peptide (DSIP) is an amphiphilic nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu and a molecular weight of approximately 849. It was first isolated by Monnier, Schoenenberger and colleagues in the 1970s from the cerebral venous blood dialysate of rabbits during electrically induced slow-wave sleep, and its structure was confirmed by amino-acid analysis and chemical synthesis. It is classified as an endogenous neuropeptide rather than a synthetic analog of any drug class.
Is DSIP research use only?
Yes. DSIP is supplied strictly for laboratory research — not for human or veterinary use, and not as a drug, food, or supplement.
Does Banger Labs provide a COA for DSIP?
Yes — a Certificate of Analysis (HPLC purity + mass-spec identity) is available per batch on request. See the COA Library.
References
- Delta sleep-inducing peptide (DSIP): a still unresolved riddle — PubMed — J Neurochem (2006 review)
- The delta EEG (sleep)-inducing peptide (DSIP). XI. Amino-acid analysis, sequence, synthesis and activity of the nonapeptide — PubMed — Pflugers Arch (1978)
- Characterization of a delta-electroencephalogram (-sleep)-inducing peptide — PMC — Proc Natl Acad Sci USA (1977)
- Delta-sleep-inducing peptide (DSIP): an update — PubMed — Peptides (1986 review)
Sources are provided for scientific reference and describe laboratory/preclinical research; they do not constitute medical advice or efficacy claims.
Shop DSIP & related research peptides
By the Banger Labs Research Team. For research use only. Not for human or veterinary use. Not a drug, food, or cosmetic. Educational information, not medical advice.