- ≥99% by HPLC; lot-matched COA available
- Lot-matched certificate of analysis
- Ships next business day, tracked
Testagen
Lys-Glu-Asp-Gly (KEDG) tetrapeptide used in reproductive-tissue research models
- FormLyophilized powder in a sealed glass vial
- Mol. weight447.44 g/mol
- Research areasReproductive tissue models, germ-cell and steroidogenic markers, gene expression, ageing
Supplied for laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any disease.
Overview
Testagen is a synthetic tetrapeptide with the sequence L-lysyl-L-glutamyl-L-aspartyl-glycine (Lys-Glu-Asp-Gly, or KEDG), supplied here as H-Lys-Glu-Asp-Gly-OH with free termini. It sits in the Khavinson short-peptide bioregulator series as the sequence associated with gonadal and reproductive tissue preparations, following the same design logic as the rest of the family: take a tissue-derived peptide extract, identify a short active sequence, and reproduce it synthetically so that experiments can be run on a defined molecule.
Its sequence is a one-residue extension of Vesugen (KED) with a terminal glycine. That relationship is useful in the laboratory, because it lets researchers ask whether adding a small, flexible residue at the C-terminus changes reported selectivity or activity while everything else about the molecule stays the same. Glycine's lack of a side chain makes it the least perturbing extension available, which is part of why the comparison is informative.
Published work involving KEDG has concentrated on testicular and gonadal tissue in rodent models, cell-culture systems examining steroidogenic and germ-cell markers, and comparisons against other members of the peptide series in the same assay. Our Testagen ships as a 20 mg lyophilized vial, HPLC purified to a ≥99% specification with a lot-matched certificate of analysis, and is offered strictly for laboratory research.
Specifications
Identity
- Molecular formula
- C17H29N5O9
- Molecular weight
- 447.44 g/mol
- Amino acid sequence
- H-Lys-Glu-Asp-Gly-OH (KEDG)
- Peptide class
- Khavinson short-peptide bioregulator (tetrapeptide)
Supply & purity
- Form
- Lyophilized powder in a sealed glass vial
- Purity
- ≥99% by HPLC; lot-matched COA available
- Available sizes
- 20 mg
- Solubility
- Bacteriostatic or sterile water; readily soluble in aqueous buffers
Handling & storage
- Storage (lyophilized)
- −20 °C, sealed and protected from light and moisture
- Storage (reconstituted)
- 2–8 °C, protected from light; use within the study window
Additional detail
- Tissue association
- Testicular and gonadal peptide preparations
- Research areas
- Reproductive tissue models, germ-cell and steroidogenic markers, gene expression, ageing
- Sequence relationship
- Vesugen (KED) plus a C-terminal glycine residue
Questions about Testagen
What is Testagen?
Testagen is the synthetic tetrapeptide Lys-Glu-Asp-Gly (KEDG) from the Khavinson short-peptide bioregulator family, associated in that literature with gonadal tissue. It is supplied as a lyophilized research chemical for laboratory use only.
Is a COA provided?
Yes. Each lot is tested by HPLC against a ≥99% purity specification and a lot-matched certificate of analysis is available on request, listing the batch identifier, purity result, identity confirmation, and appearance.
Why is there no CAS number listed?
No widely recognised CAS registry entry is available for this sequence, so we leave the field blank rather than publish an unverified number. The amino acid sequence, formula, and molecular weight are listed instead and are confirmed on the lot COA.
How does it relate to Vesugen?
Testagen is the KED tripeptide of Vesugen extended by one glycine at the C-terminus. Because glycine has no side chain, the pair is often used to test whether simply lengthening the sequence changes the behaviour reported in a given assay.
What does research use only mean?
The peptide is sold strictly for laboratory research by qualified professionals. It is not approved as a drug, supplement, or cosmetic ingredient, and no human or veterinary administration guidance is provided or implied.
How should it be stored?
Hold the unopened lyophilized vial at −20 °C, away from light and moisture. Once reconstituted, keep the solution at 2–8 °C for the study window, or freeze single-use aliquots to avoid repeated freeze-thaw cycles.
