The short version of AEDG fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-08-24 and is reviewed periodically as new material appears.
Literature searches for this compound must account for several spelling variants. Indexing databases contain epitalon, epithalon, epithalone, and AEDG, and relevant records are scattered across Russian-language and English-language journals that do not consistently cross-cite. Early publications describe the parent extract as a mixture of many peptides, whereas later work addresses the single synthetic tetrapeptide. That shift in nomenclature complicates comparison between studies, because extract data and tetrapeptide data are sometimes cited interchangeably. A search strategy omitting the alternate spellings will return an incomplete set of references.
Reported biological findings come mainly from cell culture and rodent experiments. Those studies describe changes in telomerase catalytic subunit expression, melatonin rhythm amplitude, and antioxidant enzyme activity after peptide exposure. Human data are sparse and consist of small trials with limited blinding and inconsistent endpoints. The proposed mechanisms remain hypotheses rather than established facts, and there is no consensus on whether effects observed in animals carry over to people. Independent replication outside the original research groups is limited, which is a recognised gap in the published literature.
The compound is described in the literature as a derivative of epithalamin, a preparation obtained from bovine pineal tissue. Work on this peptide family was carried out mainly by a research group in Saint Petersburg beginning in the 1980s, and the substance was later registered for clinical use in Russia under the name Epitalon. Outside that region it is generally treated as a research chemical rather than an approved medicine. Statements about its biological activity rest on a relatively small number of studies, and independent replication remains limited.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic tetrapeptide | Four amino acid residues |
| Residue sequence | Ala-Glu-Asp-Gly | Abbreviated AEDG |
| Approximate mass | 390.35 Da | Monoisotopic, free base form |
| Parent preparation | Epithalamin extract | Derived from pineal tissue |
| Common spelling variants | Epithalon, epithalone, AEDG | Affects literature retrieval |
Storage recommendations center on limiting moisture, heat, and light. The dry powder is generally kept at minus 20 degrees Celsius, and some suppliers recommend minus 80 degrees for long-term archival. Once dissolved, solutions are usually aliquoted and frozen to avoid repeated freeze-thaw cycles, which can promote aggregation or degradation. Aqueous stability depends on pH and concentration, and buffered saline is often preferred over plain water for biological work. Stability data specific to epitalon remain limited, so general peptide-handling practices are applied by analogy rather than from product-specific validation.
Epitalon is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, abbreviated AEDG. Its molecular formula is C14H22N4O9 and its calculated monoisotopic mass is approximately 390.35 daltons. The compound does not occur naturally as a free peptide; it is produced by solid-phase peptide synthesis. Because it contains two acidic residues and no basic residues, the neutral form carries a net negative charge at physiological pH. This charge profile influences how the peptide behaves in solution and during chromatographic analysis.
Laboratory-grade epitalon is typically supplied as a lyophilized powder. Purity is commonly assessed with reverse-phase high-performance liquid chromatography, often paired with mass spectrometry to confirm molecular identity. Amino acid analysis and peptide mapping can provide additional confirmation of sequence. Certificates of analysis for research materials frequently report purity above 95 percent, although the methods behind such figures vary between suppliers. The absence of a pharmacopeial monograph means that no single standardized assay defines the compound, so reported results depend on the analytical protocol chosen.
Laboratory work has examined effects on telomerase activity in cultured cells, on melatonin rhythms in animals, and on markers of oxidative stress. Some experiments report measurable changes while others show none, and the reported findings rest largely on small studies. The absence of large independent trials means the generality of these results is unresolved rather than settled. Review articles occasionally apply the label geroprotector, a term that reflects a research hypothesis about ageing rather than an established clinical finding.
Epitalon is the common name for a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, usually abbreviated AEDG. All four residues are proteinogenic amino acids, and the free peptide has a calculated mass near 390 grams per mole. Because the chain is short and carries no modifications, it is assembled readily by solid-phase synthesis and is distributed mainly as a freeze-dried solid for laboratory work. Catalogue listings use the spellings epitalon, epithalone, and simply AEDG, and the three refer to the same sequence.
The outbreak of World War I in the Polish lands offered Poles unexpected hopes for achieving independence as a result of the turbulence that engulfed the empires of the partitioning powers. All three of the monarchies that had benefited from the partition of Polish territories (Germany, Austria and Russia) were dissolved by the end of the war, and many of their territories were dispersed into new political units. At the start of the war, the Poles found themselves conscripted into the armies of the partitioning powers in a war that was not theirs. Furthermore, they were frequently forced to fight each other, since the armies of Germany and Austria were allied against Russia. Piłsudski's paramilitary units stationed in Galicia were turned into the Polish Legions in 1914 and as a part of the Austro-Hungarian Army fought on the Russian front until 1917, when the formation was disbanded. Piłsudski, who refused demands that his men fight under German command, was arrested and imprisoned by the Germans and became a heroic symbol of Polish nationalism.
Europe has a basic choice: either it lapses back into the old power politics and balance of power diplomacy of past centuries or it moves ahead along the road leading to a new order of peace and freedom, whether this be based on multinational or supranational cooperation. Our choice is clear: we are going forward.According to historian Sverre Bagge, a balance of power logic may have prevented unification of the three Scandinavian kingdoms (Norway, Sweden and Denmark), as balancing coalitions formed to prevent one kingdom from conquering the other kingdoms.
However, it is described as a "clear-headed candyflip", with entactogenic-like effects, LSD-like effects such as visuals, but a very clear head space. In addition, it is said to not have the same kind of forceful positive mood push that MDMA has, and to be a little more unpredictable and capable of causing bad trips or negative head spaces. 2C-B is said to be more of a "party drug", to be more recreational drug, and to have less likelihood of challenging, emotional-breakthrough, or mystical-type experiences, relative to psychedelics like psilocybin and LSD. Formal clinical studies have found that 2C-B produces a mixture of psychedelic, some possible entactogen-like, and some stimulant effects. Specific effects in these studies have included slight hallucinogenic states, perceptual changes, ego dissolution, time dilation, increased creativity, stimulation, vigor, happiness or elation, euphoria, feelings of well-being, reduced anger, enhanced sociability and friendliness, increased reactivity to negative emotional stimuli, decreased ability to recognize expressions of happiness, augmented emotionality in speech, tenseness, confusion, and mild sympathomimetic effects such as pressor effects, among others. Findings on the entactogen-like effects of 2C-B have been mixed, with some studies reporting that it produces such effects but other studies finding no such effects similarly to psilocybin. However, in other research, both psilocybin and MDMA have been found to increase emotional empathy.
=== Marketed === Daridorexant (nemorexant; Quviviq) – dual OX1 and OX2 antagonist – approved for insomnia in January 2022, formerly under development for sleep apnea – half-life 8 hours Fazamorexant (Mengping) – dual OX1 and OX2 antagonist – approved for insomnia in China in May 2026 – half-life 2–4 hours Lemborexant (Dayvigo) – dual OX1 and OX2 antagonist – approved for insomnia in December 2019 and released June 1 2020, under development for circadian rhythm sleep disorders, chronic obstructive pulmonary disease, and sleep apnea – half-life 17–55 hours Suvorexant (Belsomra) – dual OX1 and OX2 antagonist – approved for insomnia in August 2014, under development for delirium – half-life 12 hours Vornorexant (Vorzzz) – dual OX1 and OX2 antagonist – approved for insomnia in Japan in August 2025 – half-life 1.5–3 hours
Sources: en.wikipedia.org
== Further reading == Wolfram-Schauerte, Maik; Pozhydaieva, Nadiia; Grawenhoff, Julia; Welp, Luisa M.; Silbern, Ivan; Wulf, Alexander; Billau, Franziska A.; Glatter, Timo; Urlaub, Henning; Jäschke, Andres; Höfer, Katharina (August 16, 2023). "A viral ADP-ribosyltransferase attaches RNA chains to host proteins". Nature. 620 (7976): 1054–1062. Bibcode:2023Natur.620.1054W. doi:10.1038/s41586-023-06429-2. PMC 10468400. PMID 37587340.
Listed below are the athletes who have achieved a 1,000 pounds (453.6 kilograms) or more deadlift, a feat which has been accomplished by only 40 men in history. It includes both strongman and powerlifting deadlifts performed using only the conventional stance. Sanctioned lifts during competitions and exhibitions, as well as unsanctioned lifts during training (with video proof) are included.
A plasmid preparation is a method of DNA extraction and purification for plasmid DNA. It is an important step in many molecular biology experiments and is essential for the successful use of plasmids in research and biotechnology. Many methods have been developed to purify plasmid DNA from bacteria. During the purification procedure, the plasmid DNA is often separated from contaminating proteins and genomic DNA. These methods invariably involve three steps: growth of the bacterial culture, harvesting and lysis of the bacteria, and purification of the plasmid DNA. Purification of plasmids is central to molecular cloning. A purified plasmid can be used for many standard applications, such as sequencing and transfections into cells.
== Legislative impact == In February 2025, West Virginia lawmakers introduced House Bill 2789, also known as The Michael Brandon Cochran Act. The bill mandates intensive care units to conduct C-peptide insulin tests for unconscious patients or those presenting with hypoglycemia and blood glucose levels below 49 mg/dl. The legislation aims to prevent similar cases of insulin misuse.
==== Choanoflagellate Salpingoeca rosetta ==== (also known as Choanoflagellate Proterospongia) The choanoflagellate Salpingoeca rosetta is a rare freshwater eukaryote consisting of a number of cells embedded in a jelly-like matrix. This organism demonstrates a very primitive level of cell differentiation and specialization. This is seen with flagellated cells and their collar structures that move the cell colony through the water, while the amoeboid cells on the inside serve to divide into new cells to assist in colony growth. Similar low level cellular differentiation and specification can also be seen in sponges. They also have collar cells (also called choanocytes due to their similarities to choanoflagellates) and amoeboid cells arranged in a gelatinous matrix. Unlike choanoflagellate Salpingoeca rosetta, sponges also have other cell-types that can perform different functions (see sponges). Also, the collar cells of sponges beat within canals in the sponge body, whereas Salpingoeca rosetta’s collar cells reside on the inside; it lacks internal canals. Despite these minor differences, there is strong evidence that Proterospongia and animals are highly related.
Sources: en.wikipedia.org
It is based on epithalamin, a peptide-rich preparation obtained from pineal gland tissue and studied in the former Soviet Union. Researchers later identified the tetrapeptide AEDG as a constituent fragment of that material. Modern supplies are produced by chemical synthesis rather than tissue extraction.
No. Epithalamin is a heterogeneous extract containing many peptides, while epitalon is a single synthesised tetrapeptide. Publications sometimes treat findings from the two as equivalent, which is a common source of confusion. Their compositions differ and they are not interchangeable in analytical terms.
Most published work uses cell cultures or rodents because those models are faster and less costly to run. The few human trials that have been reported are small, and several lack control groups or blinding. This restricts what can reasonably be concluded about effects in people.
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.