This is a working overview of AEDG peptide, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-01-07 and is reviewed periodically as new material appears.
In its supplied form epitalon is a white to off-white powder, usually lyophilized and often hygroscopic. It dissolves readily in water and in aqueous buffers, and it is commonly handled as the acetate or trifluoroacetate salt to improve stability during purification and drying. The amide backbone is labile in aqueous media, so solutions are less durable than the dry solid. Handling notes in the chemical literature therefore emphasize keeping the powder dry, cool and shielded from light until it is dissolved.
Epitalon is a synthetic tetrapeptide whose sequence is alanine-glutamate-aspartate-glycine, written in single-letter code as AEDG. The four residues are joined by three peptide bonds, giving a linear backbone with no branching and no disulfide bridges. Its calculated molecular mass for the free form is approximately 390.3 daltons, a figure that rises when the compound is supplied as an acetate or trifluoroacetate salt. Because the chain is short, the molecule is defined entirely by its residue order rather than by any folded three-dimensional structure.
（TG:@pojiaai）Epitalon is a synthetic linear tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, abbreviated AEDG. It emerged from work on epithalamin, a peptide fraction prepared from bovine pineal tissue, and was designed as a short, chemically defined analogue of that extract. Early publications came mainly from Russian laboratories studying pineal peptides and aging-related endpoints. The compound appears in the literature under several spellings, including epithalon and epithalone, which complicates systematic searching. Its small size makes solid-phase assembly and routine analytical characterization straightforward.
Chemically, the molecule consists of four amino acid residues joined by three peptide bonds, with a free N-terminal amino group and a free C-terminal carboxyl group. Its molecular formula is C14H22N4O9, and its monoisotopic mass is approximately 390 daltons. The acidic glutamate and aspartate side chains give the peptide a net negative charge near neutral pH, a property that shapes its chromatographic behaviour and solubility profile. No disulfide bridges or other post-translational modifications are present, so the primary sequence alone defines the structure.
Most experimental work has been carried out in cell culture and animal models. Several reports describe changes in telomerase activity and proliferation in cultured cells, while rodent studies have examined lifespan, melatonin rhythm and reproductive endpoints. Human data remain limited, and much of the published clinical material consists of small trials with incomplete reporting of methods and controls. Whether the cell and animal findings translate into measurable effects in people is an open question, and the mechanistic basis of the reported telomerase changes is not fully established.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic tetrapeptide | Four residues, linear chain |
| Residue sequence | Ala-Glu-Asp-Gly | Single-letter form AEDG |
| Calculated mass | 390.3 daltons | Value for the free, uncharged form |
| Appearance | White to off-white powder | Usually supplied lyophilized |
| Solubility | Freely soluble in water | Often handled as a salt form |
The most frequently cited proposed action is induction of telomerase, the enzyme that adds repeat sequences to chromosome ends. Cell-culture work from the originating group reported higher telomerase reverse transcriptase expression and measurable telomere elongation in human somatic cells after exposure. How a four-residue peptide would reach nuclear gene regulation is not established, and no cell-surface receptor or uptake route has been identified. Additional reports describe changes in melatonin secretion, antioxidant enzyme activity and lipid peroxidation in aged animals, but these findings remain mechanistically unconnected to the telomerase observation.
Published evidence comes mainly from Russian-language journals and from a single research group, with small sample sizes and limited independent replication. A few laboratories outside that group have examined related peptides and reported weaker or absent telomerase effects, so the central claim is best described as contested rather than settled. Rodent studies report modest changes in some ageing markers and in survival, but designs vary and control conditions are often sparse. No large randomised trial in humans has been published, and long-term safety data in healthy populations are correspondingly thin.
Epitalon is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. It was designed at the St. Petersburg Institute of Bioregulation and Gerontology as a short, chemically defined analogue of epithalamin, a fraction obtained from bovine pineal tissue. Small peptide bioregulators of this type formed a long-running line of work there from the 1980s onward. Because the molecule is produced by solid-phase synthesis rather than extraction, its composition is exact and its purity can be measured directly.
== Early life == Born to an Indian Air Force officer, he accompanied his parents with their postings at various Indian cities. As a consequence, his education was cross cultural and spread across various regions in India and the schools he studied in include Frank Anthony School in Agra, Bishops School in Pune, Jesus and Mary School in Amritsar before completing his high schooling from The Air Force School in New Delhi. He subsequently completed his professional education from LBS College of Advanced Maritime Studies and Research as a certified Master Mariner, having earlier completed his professional training at the TS Rajendra.
Cryopreservation of ovarian tissue is of interest to women who want to preserve their reproductive function beyond the natural limit, or whose reproductive potential is threatened by cancer therapy, for example in hematologic malignancies or breast cancer. The procedure is to take a part of the ovary and perform slow freezing before storing it in liquid nitrogen whilst therapy is undertaken. Tissue can then be thawed and implanted near the fallopian, either orthotopic (on the natural location) or heterotopic (on the abdominal wall), where it starts to produce new eggs, allowing normal conception to occur. The ovarian tissue may also be transplanted into mice that are immunocompromised (SCID mice) to avoid graft rejection, and tissue can be harvested later when mature follicles have developed.
== Further reading == Schönteich, Martin; Boshoff, Henri (2003). 'Volk', Faith and Fatherland: The Security Threat Posed by the White Right (PDF). Pretoria: Institute for Security Studies. p. 72. ISBN 978-1919913308. Kemp, Arthur (2012). Victory or violence: the story of the AWB of South Africa. Burlington: Ostara Publications. ISBN 9781471067464.
restriction fragment length polymorphism (RFLP) Variability within a population of organisms observed in the size of the restriction fragments produced when genomic DNA (or any particular DNA molecule) is digested by one or more restriction endonucleases. This variability results from a corresponding polymorphism in the locations of restriction sites within the molecule(s) due to slight differences in nucleotide sequence between individuals. RFLP is frequently exploited in the laboratory to construct physical maps of the genome, to identify the specific locus occupied by a particular gene, and to detect genetic differences between closely related individuals or determine that different samples originated from the same individual. Analysis of restriction fragments can also reveal the presence of a mutation that may itself cause disease or be closely linked to one that does.
== Society and culture == Genuine owns two different tradenames for this medication: 双新艾克 (literally "dual new AIDS inhibitor") for HIV use and 捷倍安 (literally "fast extra safe") for COVID use. No generics are available. Geniune holds one patent related to the drug: the original 2007 patent on the entire class of 2'-fluorine-4'-substituted nucleotides, purchased from Zhengzhou University. Two other Chinese patents on synthesizing the drug are found on Google Patents, but the owners do not appear to be connected to Geniune. Roche held one 2002 patent, CNA028118480A (CN1516590A), over the broader class of 4'-substituted nucleotides. The patent was voided in 2019 after Riboscience, its new holder, stopped paying fees.
Sources: en.wikipedia.org
In protein sequencing, aminopeptidases are employed in the Edman degradation method. This technique involves the sequential removal and identification of the N-terminal amino acid of proteins, facilitating the elucidation of their amino acid sequence.
== Trade names == Tofisopam has been spelt alternatively as tofizopam and has been marketed and listed as ‘’‘Grandaxin’’’ in Hungary and other European countries, Pakistan, and Egypt. Japanese preparations include ‘’‘Grandaxin 10%’’’ and ‘’‘Granpam’’’ It has been marketed in India as ‘’‘Nextril’’’ and ‘’‘Toficalm’’’. Never approved in North America, including the U.S. and Canada, but it has appeared in United States patent literature and regulatory references. A U.S. patent concerning S-tofisopam was filed in 2001 and subsequently issued as U.S. Patent 6,649,607; the related patent record expired in November 2021US 7078398, "Compositions and methods for treating or preventing convulsions or seizures" </ref>
Three prime untranslated regions (3′UTRs) of messenger RNAs (mRNAs) often contain regulatory sequences that post-transcriptionally influence gene expression. Such 3′-UTRs often contain both binding sites for microRNAs (miRNAs) as well as for regulatory proteins. By binding to specific sites within the 3′-UTR, miRNAs can decrease gene expression of various mRNAs by either inhibiting translation or directly causing degradation of the transcript. The 3′-UTR also may have silencer regions that bind repressor proteins that inhibit the expression of a mRNA. The 3′-UTR often contains microRNA response elements (MREs). MREs are sequences to which miRNAs bind. These are prevalent motifs within 3′-UTRs. Among all regulatory motifs within the 3′-UTRs (e.g. including silencer regions), MREs make up about half of the motifs. As of 2014, the miRBase web site, an archive of miRNA sequences and annotations, listed 28,645 entries in 233 biologic species. Of these, 1,881 miRNAs were in annotated human miRNA loci. miRNAs were predicted to have an average of about four hundred target mRNAs (affecting expression of several hundred genes). Friedman et al. estimate that >45,000 miRNA target sites within human mRNA 3′UTRs are conserved above background levels, and >60% of human protein-coding genes have been under selective pressure to maintain pairing to miRNAs. Direct experiments show that a single miRNA can reduce the stability of hundreds of unique mRNAs.
One way is to fuse modular binding sites (e.g., MS2 RNA tagging system, or RIDD-RIAD dock-and-lock system) to the phase-separating domain (e.g., synthetic RNA repeat, or IDP) that recruit "solute" or "client" of interest. Such a modular design enables engineering, optimization, and reusability of each fusion molecule, thus commonly applied in synthetic biology and metabolic engineering. Moreover, by applying a relatively slower binding system (e.g., split GFP), the recruitment of target into synthetic condensate can be fine-tuned by growth and division rates of the living cells. Another way to gain temporal control over the formation and dissolution of biomolecular condensates is by using optogenetic tools. Several different systems have been developed which allow for control of condensate formation and dissolution which rely on chimeric protein expression, and light or small molecule activation. In one system, proteins are expressed in a cell which contain light-activated oligomerization domains fused to IDRs. Upon irradiation with a specific wavelength of light, the oligomerization domains bind each other and form a 'core', which also brings multiple IDRs close together because they are fused to the oligomerization domains. The recruitment of multiple IDRs effectively creates a new biopolymer with increased valency. This increased valency allows for the IDRs to form multivalent interactions and trigger LLPS. When the activation light is stopped, the oligomerization domains disassemble, causing the dissolution of the condensate.
Sources: en.wikipedia.org
The peptide contains four residues in the order alanine, glutamate, aspartate and glycine, abbreviated AEDG. The chain is linear and held together by three peptide bonds. Its calculated mass for the uncharged free form is about 390.3 daltons.
Epithalamin refers to a crude preparation derived from bovine pineal tissue, which contains many components. Epitalon is a single synthetic tetrapeptide identified from that material and produced by chemical synthesis. The two names are sometimes confused because early reports treated the synthetic peptide as an active fragment of the extract.
It has been registered for clinical use in Russia, where it is associated with a small family of short peptides. In most other jurisdictions it is not an approved medicine and is traded as a research chemical. Regulatory status varies by country and changes over time.
It is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, often abbreviated AEDG. The molecule is linear and contains no modified residues, so it is fully described by its sequence.