Testagen
Testagen is a peptide, indexed here under Short peptide bioregulators.
Identity
| Field | Value |
|---|---|
| Classification | Peptide |
| Primary class | Short peptide bioregulators |
| CAS registry number | Unknown PubChem returned no compound record for this name on the retrieval date, so this field is not sourced. |
| PubChem CID | Unknown PubChem returned no compound record for this name on the retrieval date, so this field is not sourced. |
| UniProt accession | Unknown No UniProt query was run in v1. |
| Molecular formula | Unknown PubChem returned no compound record for this name on the retrieval date, so this field is not sourced. |
| Molecular weight | Unknown PubChem returned no compound record for this name on the retrieval date, so this field is not sourced. |
| Amino-acid sequence | Unknown Not reported by the PubChem property set retrieved for this record; no sequence database query was run in v1. |
| Reported half-life | Unknown No pharmacokinetics source was retrieved in v1. PubChem does not carry half-life as a property, so this is recorded as not yet sourced rather than estimated. |
What the cited literature examines
Testagen is the synthetic tetrapeptide Lys-Glu-Asp-Gly. PubChem returned no compound record for either name, so the identity fields on this page are unsourced. Its retrieved literature studies it alongside the Ala-Glu-Asp-Gly peptide, Epitalon, in hypophysectomised birds: a 2008 Bulletin of Experimental Biology and Medicine paper and 2011 papers in the same journal and in Advances in Gerontology report the structure and hormonal activity of the thyroid gland, a 2013 paper reports the morphology of the thymus in young and old birds, and a 2010 Patologicheskaia Fiziologiia paper reports immunity, haemostasis and morphology endpoints.
One record is outside biology: a 2025 Molecules paper reports the inhibitory effect and adsorption properties of the peptide on copper surfaces in saline environments.
[2, 3, 4, 5, 6, 7]Reported mechanism
A tetrapeptide bioregulator; the retrieved records report thyroid and thymus endpoints in hypophysectomised birds, with no receptor target named.
[2, 5]Stated in the titles of the cited 2008 and 2013 Bulletin of Experimental Biology and Medicine papers.
Targets named in the cited records: thyroid gland, thymus.
FDA application register
A query of the FDA Drugs@FDA application register on 2026-10-09 returned no application records for this compound name. This compound is not approved by the FDA for human use.[1]
Scope statement: this records the result of a single automated query against the openFDA drugsfda endpoint on the stated date. It is not legal advice and is not a jurisdiction-by-jurisdiction legality assessment.
Retrieved 2026-10-09.
Amounts reported in the cited literature
Unknown. No retrieved record in this dataset states an amount, so none is shown. Where an amount is recorded it is what a named study reported administering in its own stated model, in the past tense, and is not a protocol.
No study-reported dose was taken from a source read in v1. Literature-reported values are only recorded where the retrieved citation metadata states the figure.
Adverse effects reported in the cited literature
Unknown. No retrieved record in this dataset reports an adverse effect for this compound, so no row is shown. Absence of a row records the absence of a retrieved report, nothing more.
No adverse-effect row was taken from a source read in v1. Rows are only recorded with the study model named and the reporting citation attached.
Other names
Testagen appears under these other names in the cited records or in common usage. Each one resolves to this page rather than to a separate page of its own.
- Lys-Glu-Asp-Gly
- KEDG peptide
Where this page sits
Research records
Cited research records for Testagen, each with its identifier, the publication type it is indexed as, and the study model stated by its assigned subject headings.
Compounds indexed next to it
Class page: Short peptide bioregulators. Full index: all indexed compounds.
Questions this page answers
What does the cited literature examine for Testagen?
Testagen is the synthetic tetrapeptide Lys-Glu-Asp-Gly. PubChem returned no compound record for either name, so the identity fields on this page are unsourced.
Which class is Testagen indexed under?
Testagen is indexed under Short peptide bioregulators. This class groups the short synthetic peptides and tissue polypeptide extracts developed by the St Petersburg bioregulator programme, which research-peptide catalogues sell as a family.
What does the FDA application register show for Testagen?
A query of the FDA Drugs@FDA application register on 2026-10-09 returned no application records for this compound name. This compound is not approved by the FDA for human use.
Sources
- Drugs@FDA application register query for this compound, no application records returned. U.S. Food and Drug Administration, openFDA drugsfda endpoint (2026). fda:testagen
- Effect of tetrapeptides Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly on the structure and function of the thyroid gland in neonatally hypophysectomized chickens. Bulletin of experimental biology and medicine (2008). pmid:19024016
- Effects of peptides Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly on hormonal activity and structure of the thyroid gland in hypophysectomized young chickens and old hens. Bulletin of experimental biology and medicine (2011). pmid:22268052
- [Effects of Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly peptides on hormonal activity and thyroid morphology in hypophysectomized mature and old birds]. Advances in gerontology = Uspekhi gerontologii (2011). pmid:21809626
- Effect of peptides Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly on the morphology of the thymus in hypophysectomized young and old birds. Bulletin of experimental biology and medicine (2013). pmid:23658898
- [Effects of hypophyseal Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly synthetic peptides on immunity, hemostasis, morphology and functions of the thyroid gland in neonatally hypophysectomized chicken and one-year-old birds]. Patologicheskaia fiziologiia i eksperimental'naia terapiia (2010). pmid:20731122
- The Inhibitory Effect and Adsorption Properties of Testagen Peptide on Copper Surfaces in Saline Environments: An Experimental and Computational Study. Molecules (Basel, Switzerland) (2025). pmid:40807317
On each stated value was matched to the record cited for it. That is record matching, not an appraisal of the research. Compiled and checked by: Peptide Monographs editorial desk. No qualified clinical reviewer.