Product details
DSIP (Delta Sleep-Inducing Peptide) is a nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) originally isolated from rabbit cerebral venous blood during electrical stimulation of sleep-promoting brain regions. The molecule has been studied since the 1970s for its proposed role in slow-wave (delta) sleep regulation, stress-response modulation, and neuroendocrine effects on cortisol and GH release. Despite decades of research, DSIP's precise receptor target remains unidentified, the molecule's pharmacology is mechanistically less well-characterized than other cognitive-research peptides, which is the basis for the ongoing research interest.
Peptuno supplies DSIP as a lyophilized powder at ≥99.0% HPLC purity. The standard analytical packet covers peak-integration HPLC, mass spec, water content, and counter-ion. Standard fill sizes (2-15 mg) cover most research workflows. Buyers should note that DSIP is exceptionally hygroscopic compared with other short peptides, vials should be reconstituted promptly after opening and unused powder should be stored sealed under nitrogen or dry argon when possible. Reconstituted solutions should be aliquoted into single-use volumes and held at -20 °C with strict freeze-thaw management.
FAQ
- What is DSIP's proposed mechanism of action, given its receptor is unidentified?
- DSIP's effects in sleep, stress, and neuroendocrine research models are well-documented across decades of literature, but the molecule's primary receptor binding site has not been definitively identified. Proposed mechanisms include modulation of GABAergic transmission, indirect effects on melatonin and serotonin pathways, and direct or indirect interaction with adenosine receptor signaling in sleep-promoting brain regions. The orphan-receptor status is unusual for a peptide with reproducible behavioral effects and is part of why DSIP remains an active research target rather than a fully-characterized pharmacological tool.
- Why is DSIP particularly hygroscopic, and how should it be handled?
- DSIP's sequence is unusually polar, multiple Asp, Glu, Ser, and Gly residues with very few hydrophobic anchors, which produces a lyophilizate that absorbs ambient moisture more rapidly than most short peptides. Practical handling: minimize the time the vial is open in ambient air, reconstitute promptly after first opening, and consider storing partially-used vials under dry nitrogen or argon. Water uptake doesn't directly destroy DSIP, but it accelerates hydrolytic degradation pathways during long-term storage and shifts the concentration of any subsequent reconstitution by a few percent.
Certificate of Analysis (COA)
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