DSIP explained: name, sequence and CAS number

DSIP is a nonapeptide, a chain of nine amino acids, with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu and the CAS number 62568-57-4. The abbreviation stands for Delta Sleep-Inducing Peptide. This guide covers the identifiers on our listing, what a nonapeptide is and how the compound is supplied.

DSIP at a glance

What does nonapeptide mean?

The prefix comes from the Greek word for nine. A nonapeptide has nine amino acid residues joined by peptide bonds. In DSIP the order runs from tryptophan at one end to glutamic acid at the other, so the three-letter sequence above is read left to right as written.

Because the sequence is fixed, a correctly made batch should have a single expected molecular mass. Our listing does not state a molecular formula or weight for DSIP, so the figure to compare against should come from the batch certificate of analysis rather than from this guide.

Why is the CAS number useful?

A CAS Registry Number is a numeric identifier assigned to one substance. Names and abbreviations vary between suppliers, but the number 62568-57-4 should match across the listing, the vial label and the batch documents. If any of the three disagree, the material is worth querying before it is used for anything. The wider habit is covered in what is a CAS number.

Which listings contain DSIP?

The duo supplies nothing premixed. Selank is listed as a heptapeptide and tuftsin analogue with the CAS number 129954-34-3. For the difference between a premixed vial and separate vials, see peptide blends vs separate vials.

What should the documentation show?

• The compound name and batch number match the vial label.
• An HPLC purity figure for the batch.
• A mass result consistent with the stated sequence.
• Appearance recorded as a white lyophilised powder.

Batch documents are on the COAs page. For handling of sealed vials see storing research peptides: lab good practice.

Frequently asked questions

What is the CAS number for DSIP?

The CAS number listed for DSIP is 62568-57-4.

What does DSIP stand for?

DSIP stands for Delta Sleep-Inducing Peptide. It is the name given to the nonapeptide, and the abbreviation is used on the listing.

How many amino acids are in DSIP?

Nine. The sequence is Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu.

What vial sizes are listed?

The single-compound listing is offered in 5mg and 15mg vials. The duo contains a 15mg DSIP vial alongside a 10mg Selank vial.

Is the duo one vial or two?

Two separate vials. Nothing in the duo is premixed.

All Ascend Research products are sold strictly for laboratory research use only. They are not for human or animal use, and nothing in this article is medical advice.

The Ascend Research team