Peptide Medix product catalog

Peptide Medix

Pancragen

Lys-Glu-Asp-Trp (KEDW) short-peptide bioregulator, 20 mg vial

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Categories: pancragen , kedw peptide , khavinson bioregulators

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Overview

Pancragen is the tetrapeptide Lys-Glu-Asp-Trp, usually written KEDW, one of the synthetic short-peptide bioregulators developed within Vladimir Khavinson's programme at the Saint Petersburg Institute of Bioregulation and Gerontology. In that framework each short sequence is associated with a specific tissue, and Pancragen is the peptide linked to pancreatic tissue — the synthetic counterpart of the earlier organ-extract preparation Suprefort.

Supplied as a lyophilized 20 mg vial of ≥99% HPLC-purity peptide with a lot-matched certificate of analysis. At four residues and roughly 577 g/mol, KEDW is small enough that the mechanism proposed for this peptide family — direct entry into cells and nuclei with interaction at specific DNA sequences to modulate transcription, rather than binding a cell-surface receptor — is at least structurally plausible. Molecular-modelling and cell studies from the originating group support it; independent replication outside that group remains limited.

Specifications

Brand Peptide Medix
Category Khavinson Bioregulators
Form Lyophilized powder in a sealed glass vial
Purity ≥99% by HPLC; lot-matched COA available
Available size 20 mg
Amino acid sequence Lys-Glu-Asp-Trp (KEDW)
Chain length 4 amino acids (tetrapeptide)
Molecular formula C26H36N6O9
Molecular weight ≈576.6 g/mol
Peptide class Khavinson short-peptide bioregulator (tetrapeptide)
Tissue association Pancreatic peptide preparations; synthetic analogue of Suprefort
Proposed mechanism studied Direct peptide–DNA and chromatin interaction influencing transcription, rather than surface-receptor signalling
Research areas Islet and beta-cell cultures, Pdx1 and Ngn3 expression, insulin gene expression, cell proliferation and apoptosis in ageing models
Solubility Bacteriostatic or sterile water; readily soluble in aqueous buffers
Storage (lyophilized) −20 °C, sealed and protected from light and moisture
Storage (reconstituted) 2–8 °C, protected from light; use within the study window
SKU PANCRAGEN-20-MG

Highlights

  • Synthetic KEDW tetrapeptide (Lys-Glu-Asp-Trp), ≥99% by HPLC with lot-matched COA
  • 20 mg lyophilized powder in a sealed glass vial
  • Khavinson-class short-peptide bioregulator, associated with pancreatic tissue
  • Synthetic counterpart of the organ-extract preparation Suprefort
  • Very low molecular weight (≈577 g/mol) for a four-residue peptide
  • Studied in islet-cell, insulin gene expression and tissue-ageing models
  • Freezer storage for the powder; ships from the United States
  • Research use only — not a drug, supplement or consumer product

What's Included

  • The vial option and size selected above
  • Final item and quantity confirmed in cart
  • Laboratory-research-use labeling

Research Overview

Where the compound comes from

The Khavinson programme began with peptide fractions extracted from animal organs — thymus, pineal, vessel, pancreas — and later replaced them with defined synthetic short sequences intended to reproduce the activity of each extract. Pancragen is the pancreatic member of that synthetic set, standing in the same relation to Suprefort as Vesugen does to vascular preparations and Testagen to testicular ones.

Proposed mechanism

Reported observations for KEDW

  • Changes in expression of pancreatic transcription factors including Pdx1 and Ngn3 in cell culture
  • Effects on insulin gene expression measures in islet-derived preparations
  • Altered proliferation and apoptosis markers in cultures from aged donors
  • Comparative work against other short peptides in the same series to test sequence specificity

Evidence quality

Handling & Storage

Keep the sealed vial at −20 °C, dry and shielded from light until the day of use, and allow it to reach room temperature before opening so condensation does not settle on the powder. Reconstitute by running bacteriostatic or sterile water slowly down the inside wall of the vial rather than directly onto the cake, then swirl gently until clear — do not shake or vortex, which shears peptide and causes foaming. Hold solutions at 2–8 °C protected from light and record the reconstitution date on the vial. For longer holds, prepare single-use aliquots and freeze them so repeated freeze–thaw cycles are avoided.

Pancragen FAQ

What does KEDW stand for?
It is single-letter shorthand for the sequence: K for lysine, E for glutamic acid, D for aspartic acid, W for tryptophan. Pancragen is the name used in the Khavinson short-peptide literature for that synthetic tetrapeptide, which is associated there with pancreatic tissue preparations.
How does Pancragen relate to Suprefort?
Suprefort is the older preparation made from animal pancreatic tissue extract, containing a mixture of peptides. Pancragen is the defined synthetic tetrapeptide developed to reproduce that activity with a single known sequence, which makes it far more tractable as a research article.
What purity and documentation do you provide?
Vials are ≥99% pure by HPLC and each lot carries a matched certificate of analysis with purity and mass-spectrometric identity confirmation. Quote the lot number printed on the vial label when requesting the document.
How strong is the published evidence?
It is preliminary. Most work comes from the research group that developed the short-peptide bioregulator concept and consists of cell-culture and small-animal studies rather than independent trials. Sequence-specific controls are advisable, since specificity is the central claim being tested.
How should the vial be stored?
Store the lyophilized powder sealed at −20 °C, dry and away from light. Once reconstituted, keep the solution at 2–8 °C protected from light and use it within your defined study window, or aliquot and freeze to avoid repeated freeze–thaw cycles that degrade peptide.

This catalog listing is for laboratory research use only. It is not represented as a drug, food, supplement, cosmetic or diagnostic product, and it is not offered for human or veterinary use.

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