01 / Reference identity
Identity at a glance.
Public records identify DSIP as one nine-residue peptide, listed under its international nonproprietary name, emideltide. The values below are for the free peptide; the salt form of a supplied lot follows its own record.
| Sequence, three-letter | Trp–Ala–Gly–Gly–Asp–Ala–Ser–Gly–Glu |
|---|---|
| Sequence, one-letter | WAGGDASGE |
| Length | 9 residues |
| Formula, free peptide | C35H48N10O15 |
| Molecular weight, free peptide | 848.8 g/mol |
| CAS number | 62568-57-4 |
| PubChem CID | 68816 |
| Other names in public records | Emideltide (INN) |
References: [2]
02 / Molecular architecture
A closer look at the chain.
DSIP is a nonapeptide, WAGGDASGE: tryptophan at the N-terminus, glycines at positions 3, 4 and 8, and two acidic residues, Asp5 and Glu9. Its descriptive name comes from historical observations and should not be treated as a guarantee of a reproducible outcome in every model.
- 9 amino acids
- Trp at the N-terminus
- Glycines at 3, 4 and 8
- Also called emideltide
- 1Trp
- 2Ala
- 3Gly
- 4Gly
- 5Asp
- 6Ala
- 7Ser
- 8Gly
- 9Glu
Reference information: [1][2]. Actual lot identity must be verified separately.
A historical name, a specific molecule.
DSIP and emideltide refer to the same reference identity. The expanded historical name describes how the peptide became known, whereas nonapeptide describes its nine-residue chain. Neither a descriptive name nor a residue count is a substitute for specifying the complete material in an analytical comparison.
Separating identity from an experimental endpoint.
An identity record asks which molecule was examined. An experimental endpoint asks what was measured in a particular system. For DSIP, keeping these questions separate helps avoid treating the name as a prediction. The reported conditions and endpoint remain necessary to understand what an experiment can establish.
Structure and research references: [1]
03 / Read the evidence
Research & analytical context.
The technical record identifies DSIP as a nonapeptide. Its historical name is a naming convention, not an analytical specification. Sequence, terminal chemistry and the supplied chemical form are the useful points of comparison between records.
The distinction that matters
Match the full molecular identity when comparing sources. A familiar abbreviation does not verify the identity, purity or content of a vial.
04 / From reference to record
Know the lot, too.
A publication describes its own test material. Your lot’s certificate describes what was tested on that lot. Keep the compound name, batch number and reported methods together when reviewing a result.
Identity & composition
Check sequence or chemical form, terminal modifications, counterion and—where relevant—each blend component.
Analytical results
Read purity, content, sterility and endotoxin results as separate measurements. Only call a test passed when the actual report supports it.
Handling & storage notes
Lyophilized material: Store at −20°C; protect from light and moisture.
Follow the material-specific label and supporting storage documentation. These temperatures do not establish a shelf life.
How to store lyophilized peptides05 / Reference questions
A few details, explained.
What does nonapeptide mean?
It means a peptide containing nine amino-acid residues. It describes chain length, not a particular sequence or a guaranteed property shared by every nine-residue peptide.
Is emideltide a separate ingredient?
It is a synonym in the DSIP reference record, rather than an extra component. Use the full chemical identity when comparing records that use different names for the material.
Read alongside the references: [1]
06 / Continue reading
Go to the source.
Each source is labeled by its type. External sources are not Pioneer batch certificates.