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Cognitive explainer

What is DSIP?

Nonapeptide first isolated in 1977 from the blood of sleeping rabbits.

CognitiveCAS 62568-57-49 residuesDelta sleep-inducing peptideUpdated 2026-11-09
Original illustration for DSIP research notes: abstract molecular artwork in orange and teal
Original illustration by USA Peptide Vendors; artistic, not a structural model.

What has actually been studied?

DSIP induced delta-wave EEG activity in recipient rabbits. Its receptor and mechanism are still unresolved.

How is DSIP thought to work?

Evidence level: Limited: original rabbit studies. All mechanism maps

DSIP mechanism diagramIsolated for inducing delta-wave sleep EEG; mechanism still unresolved. Targets: Not identified. Mechanism: Unresolved. Effect reported: Delta-wave EEG ↑.DSIP mechanism mapIsolated for inducing delta-wave sleep EEG; mechanism still unresolvedDSIPWAGGDASGENot identified[1]UnresolvedDelta-wave EEG ↑recipient rabbits [1]Evidence: Limited: original rabbit studies. Numbers in brackets refer to the cited sources.usapeptidevendors.com · Research Use OnlyRECEPTORMECHANISMEFFECT REPORTED
Later studies gave mixed results, and no DSIP gene or receptor has been confirmed. Open SVG
  1. Schoenenberger GA et al. Characterization of a delta-electroencephalogram (-sleep)-inducing peptide. Proc Natl Acad Sci U S A. 1977;74:1282-6.

What does the molecule look like?

Amino acid sequence · 9 residues
  1. W1
  2. A2
  3. G3
  4. G4
  5. D5
  6. A6
  7. S7
  8. G8
  9. E9
  • CAS number62568-57-4
  • Molecular formulaC35H48N10O15
  • Molecular weight848.8 g/mol
  • PubChem CID68816
  • Length9 residues

Verified 2026-11-09 against PubChem CID 68816. Values we couldn't verify are left out.

Where do US labs buy DSIP?

36 of 112 directory vendors list DSIP; 17 name their testing lab.

What should the certificate show?

  • Match the CAS number on the certificate to 62568-57-4.
  • A 9-residue peptide should show a mass-spec identity near 848.8 g/mol; HPLC purity alone doesn't confirm identity.
  • 36 of the 112 vendors in our directory list DSIP; 17 of those name the lab that tests it.

Other questions researchers ask

What is DSIP?

Nonapeptide first isolated in 1977 from the blood of sleeping rabbits. DSIP induced delta-wave EEG activity in recipient rabbits. Its receptor and mechanism are still unresolved.

What are DSIP's CAS number and molecular weight?

CAS 62568-57-4, formula C35H48N10O15, 848.8 g/mol, per PubChem CID 68816.

Where can US labs buy DSIP?

Purgo Labs stocks it as “DSIP”; code usapeptidevendors takes 25% off at checkout. This page also lists the best-documented second vendor from our 112-vendor directory.

Is research-grade DSIP for human use?

No. Vendor material is sold for Research Use Only, not for human or veterinary use.