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Bioregulators · Research guide · Updated 2 October 2026

What is testagen, and what is it studied for?

Testagen is the tetrapeptide Lys-Glu-Asp-Gly, from the St Petersburg bioregulator programme, associated in that literature with endocrine tissue models. No PubChem record under the name has been confirmed, so the formula C17H29N5O9 and mass 447.45 are derived from the sequence by arithmetic shown below, and the certificate's identity mass of 447.4 agrees. Its literature is sparse and from one group. The material is for in-vitro research only.

What is the structure of Testagen?

Four residues with free termini: lysine, glutamate, aspartate, glycine. Residue masses 146.19, 147.13, 133.10 and 75.07 sum to 501.49; subtracting three waters (54.05) gives 447.44, which matches the certificate's 447.4 by MALDI-MS. Net charge near minus one at neutral pH; immediately water-soluble. The CAS field is blank because no registry number has been confirmed.

IdentifierValue
Molecular formulaC17H29N5O9
Molecular weight447.45 g/mol
Residues4
CAS numbernot recorded
PubChem CIDnot recorded
Current lotTESTA20-0528

How is Testagen thought to work?

As for the series, the designers propose direct interaction with DNA that alters gene expression; no receptor is identified and the model is not independently established. Specific reports on this tetrapeptide are limited to the programme's cell and rodent work.

Which research areas use Testagen?

AreaTypical models and endpoints
Endocrine tissue modelsCell-culture and rodent work from the bioregulator programme.
Bioregulator comparisonsSide-by-side work with vesugen and prostamax, which share the Lys-Glu-Asp core.
Analytical chemistryA tetrapeptide whose identity is a worked mass calculation against a certificate.

What does the published literature show?

Anisimov and Khavinson's 2010 Biogerontology review and Khavinson and Morozov's 2003 report place the tetrapeptide in the series. Primary reports are sparse and from one laboratory group; no clinical study is registered and no product is approved. Research use is in-vitro and preclinical.

How is Testagen handled in the laboratory?

Dissolves instantly in water or buffer. No oxidation-prone residues; aspartate isomerisation is the slow route, so hold stocks near neutral. Store lyophilized at minus 20 °C; aliquot and freeze. The concentration table covers volumes and syringe units; the storage guide covers stability by compound class.

What does the current certificate show?

Lot TESTA20-0528 tested at 99.9% purity by RP-HPLC (214 nm), identity confirmed by MALDI-MS, endotoxin <0.05 EU/mL. The certificate is in the COA library and the lot number on the vial matches it. Sold as 20 mg per vial at $60, for laboratory research only.

Certificate history for Testagen

Every certificate the library holds for this compound, newest first. A replaced lot stays listed so the history can be read; the certificate dataset reads all 114 together.

LotIssuedSizeIdentityPurityContentStatus
TESTA20-0528Jun 17, 202620 mgMALDI-MS99.9%20.32 mgCurrent

Frequently asked questions

Why is the mass calculated rather than looked up?

Because no PubChem record under this name has been confirmed. The arithmetic is shown so it can be checked, and the certificate's measured mass agrees with it.

What does the current certificate show?

Lot TESTA20-0528: identity by MALDI-MS at 447.4, purity 99.9% by RP-HPLC at 214 nm, content 20.32 mg, endotoxin below 0.05 EU/mL, sterility not detected. Issued 17 June 2026.

How does it differ from vesugen and prostamax?

All three share Lys-Glu-Asp: vesugen is the tripeptide, testagen adds glycine, prostamax adds proline. Masses 390.4, 447.4 and 487.5.

References

  1. Anisimov VN, Khavinson VK. Peptide bioregulation of aging: results and prospects. Biogerontology. 2010;11(2):139-149.
  2. Khavinson VK, Morozov VG. Peptides of pineal gland and thymus prolong human life. Neuro Endocrinol Lett. 2003;24(3-4):233-240.

Clinical results cited above describe regulated trials of pharmaceutical products and are given as context for research interest only. Nothing on this page describes or recommends use of the material sold here in humans or animals.

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Restock alerts and new lot reports, by email

One email when a new certificate is published, when a sold-out compound is back, or when a new compound is added. About twice a month, nothing else.