DSIP Peptide for Laboratory Research

DSIP peptide is a linear, non-amidated nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, or WAGGDASGE in one-letter notation. Amino-acid analysis and chemical synthesis established this sequence in an analytical and preclinical publication. The sequence definition is the starting point for literature assignment, but it is not evidence that a received sample contains the named molecule.

The identifiers below describe non-phosphorylated DSIP as the free acid. Formula, average mass, registry identifiers and sequence must be kept distinct from presentation, stated content and batch results.

These registry values define a referenced molecular entity and do not identify a supplied sample. Supplied form and stated content are to be reconciled against released label, specification and batch documentation. The same documentary boundary applies to salt form, phosphorylation state and any batch-specific analytical result.

Identity source: Schoenenberger et al. 1978 · PMID 568769

No established receptor or unified mechanism is assigned to DSIP in the source evidence. The cited literature instead covers separate delta-EEG, pineal-gland, mitochondrial-respiration and tissue-marker endpoints in defined rabbit and rat systems. A measured endpoint in one preparation cannot be converted into a general mechanism or transferred to another model.

Oaknin and colleagues studied melatonin synthesis in a rat pineal-gland model. Khvatova and colleagues measured respiratory activity in isolated rat-brain mitochondria under experimental hypoxia. Bondarenko and colleagues measured lipid peroxidation and xanthine oxidase activity in rat tissues during experimental cold exposure. These publications concern distinct systems and do not establish one organism-level property.

Graf and Kastin reviewed occurrence, distribution, structure and varied neurophysiological observations across a predominantly preclinical literature, noting variability and inconsistency in parts of that evidence base. The review helps map the field, but does not resolve molecular form or certify a supplied lot.

Target-system sources: Graf & Kastin 1984 · PMID 6145137 · Oaknin et al. 1986 · PMID 3774211 · Khvatova et al. 2003 · PMID 12668217 · Bondarenko et al. 2001 · PMID 11265821

This section describes findings in controlled research and makes no statement about use. The records progress from analytical characterisation through preclinical animal and isolated-tissue systems to one observational human study of endogenous peptide. Model type, analyte, method and endpoint delimit every interpretation.

Study sources: PMID 568769 · PMID 1237876 · PMID 265572 · PMID 3774211 · PMID 11265821 · PMID 12668217 · PMID 7700506 · PMID 6145137

The historical expanded name is “delta sleep-inducing peptide”. It arose from the circumstances of early rabbit neurophysiology experiments and functions here solely as scientific nomenclature. The unhyphenated rendering “delta sleep inducing peptide DSIP” refers to that same historical name; neither form establishes a human outcome or a property of supplied material.

DSIP and P-DSIP are different molecular forms. DSIP in this profile is the non-phosphorylated sequence WAGGDASGE. P-DSIP is phosphorylated at the serine residue. A shared base name does not transfer molecular identity data, analytical results or literature assignments between the two forms.

This distinction is analytically consequential. HPLC reports chromatographic behaviour and a method-specific purity result for the tested lot, but retention behaviour alone does not establish whether the intact analyte is non-phosphorylated DSIP or P-DSIP. Lot-linked mass-spectrometric evidence is needed to support molecular-form identity. Conversely, an identity-supporting mass result does not by itself establish chromatographic purity.

A defensible record therefore connects the declared molecular form, sequence, product identifier, lot code, identity method and result. Literature mentioning the same base name cannot substitute for this chain and cannot be assigned across molecular forms without analytical justification.

Nomenclature and sequence sources: Monnier et al. 1975 · PMID 1237876 · Schoenenberger et al. 1977 · PMID 265572 · Schoenenberger et al. 1978 · PMID 568769

Physical form, stated content, storage conditions and stability period are to be reconciled against the released label, specification and batch documentation. No numerical content, temperature or stability period is inferred from molecular literature. If the supplied material is confirmed as lyophilised, that term describes physical presentation only; it does not establish sequence, molecular form, content, stability or purity.

Laboratories seeking to buy DSIP for research should verify before procurement that the product name, SKU DS5, declared molecular form, lot code and COA identify the same material. Any discrepancy among the released label, specification and certificate should be resolved before the material is assigned to an experiment.

A numerical purity statement applies only to the analysed lot and the method reported on its COA. HPLC can support a batch-specific chromatographic result. It cannot alone distinguish non-phosphorylated DSIP from serine-phosphorylated P-DSIP; that identity question requires appropriate lot-linked mass-spectrometric evidence. Literature establishes neither the purity nor the identity of supplied material.

Analytical context: Schoenenberger et al. 1978 · PMID 568769

DSIP is supplied to laboratories in the EU as research material. Published records define research questions and model-specific measurements; they do not certify the molecular form, physical form, content, purity or stability of supplied material. Those properties require the applicable released specification, label and lot documentation.

Experimental findings remain attached to the named molecule, model, method and endpoint. Observations involving endogenous peptide, animal models, isolated tissues or a review are not interchangeable with one another and do not predict an outcome outside the stated system.

Research use only. For laboratory research only. Not for human or veterinary use. Not intended to diagnose, treat, cure or prevent any disease. Not a medicinal product, food or cosmetic.