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RRP Peptides supplies items strictly for laboratory and scientific research purposes only. As part of our commitment to supporting the research community, we ensure all products are manufactured and handled in accordance with high quality standards and applicable regulatory requirements. All peptides and products sold by RP Peptides are not intended for human consumption, medical use, or clinical application.

If you are seeking high-quality products for research within the UK, you can explore the RP Peptides catalogue of compounds developed to support scientific study, analytical work, and innovation.

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DSIP Nasal 5mg – Buy Research peptides online

DSIP (Delta Sleep-Inducing Peptide) Nasal is a synthetic peptide solution in nasal spray form, developed strictly for scientific and laboratory research. This product is not intended for human or veterinary use.

Each unit contains 5 milligrams of high-purity DSIP, produced under stringent quality control procedures to ensure consistency, accuracy, and reliability in controlled research environments.

Peptides are short chains of amino acids linked by peptide bonds.^[1][2] A polypeptide is a longer, continuous, unbranched peptide chain.^[3] Polypeptides that have a molecular mass of 10,000 Da or more are called proteins.^[4] Chains of fewer than twenty amino acids are called oligopeptides, and include dipeptides, tripeptides, and tetrapeptides.^[5]

Amino acids comprise peptides as residues.^[6] Peptides are usually “linear” with an N-terminal (amine group) and C-terminal (carboxyl group) residue at the ends. Cyclic peptides are a distinct class.

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Peptides have been classified according to their sources and functions.^[7] Some groups of peptides include plant peptides, bacterial/antibiotic peptides, fungal peptides, invertebrate peptides, amphibian/skin peptides, venom peptides, cancer/anticancer peptides, vaccine peptides, immune/inflammatory peptides, brain peptides, endocrine peptides, ingestive peptides, gastrointestinal peptides, cardiovascular peptides, renal peptides, respiratory peptides, opioid peptides, neurotrophic peptides, and blood–brain peptides.^[8]

Some ribosomal peptides are subject to proteolysis. These function, typically in higher organisms, as hormones and signaling molecules. Some microbes produce peptides as antibiotics, such as microcins and bacteriocins.^[9]

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Peptides frequently have post-translational modifications such as phosphorylation, hydroxylation, sulfonation, palmitoylation, glycosylation, and disulfide formation. In general, peptides are linear, although lariat structures have been observed.^[10] More exotic manipulations do occur, such as racemization of L-amino acids to D-amino acids in platypus venom.^[11]

Nonribosomal peptides are assembled by enzymes, not the ribosome. A common non-ribosomal peptide is glutathione, a component of the antioxidant defenses of most aerobic organisms.^[12] Other nonribosomal peptides are most common in unicellular organisms, plants, and fungi and are synthesized by modular enzyme complexes called nonribosomal peptide synthetases.^[13]