Everything below concerns Khavinson. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-06-12. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
Published studies on epitalon are dominated by a small number of research groups, and independent replication in other laboratories remains limited. Proposed mechanisms include activation of telomerase and modulation of melatonin rhythms, but the evidence for either rests mainly on cell cultures and animal models. Whether the peptide produces comparable effects in humans is an open question, and the absence of large controlled trials means the literature is best read as exploratory rather than settled.
Epitalon is a synthetic four-amino-acid peptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. Its molecular formula is C14H22N4O9, and its calculated molar mass is approximately 390.35 grams per mole. The compound is a short fragment related to a peptide fraction isolated from bovine pineal gland extracts, and it is normally supplied as a lyophilised powder intended for laboratory research. It is not a registered pharmaceutical product in most countries.
The peptide emerged from research carried out in Saint Petersburg from the late 1980s onward, where investigators searched for shorter active fragments of a pineal preparation known as epithalamin. The name epitalon was chosen to reflect that parent extract. Early reports described effects on neuroendocrine markers and on the lifespan of laboratory animals. Much of that work appeared in Russian-language journals, with English translations following later, which affects how readily the original protocols can be assessed by outside groups.
| 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 compound is generally presented as a synthetic fragment of epithalamin, a pineal gland extract investigated in the former Soviet Union from the 1970s onward. Vladimir Khavinson and colleagues in Saint Petersburg developed short peptides modelled on such extracts, and epitalon became the most widely cited of those sequences. Most primary reports appeared in Russian-language journals or in proceedings with limited international circulation. Independent replication in laboratories outside that network remains sparse, and much repeated secondary material traces back to a small number of originating groups.
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.
Residue composition is the property that most cleanly separates verified material from mislabelled samples. Alanine, glutamate, aspartate and glycine appear in that order from the N-terminus, and the two acidic residues sit in the middle of the chain. Because the peptide is short, it can be produced by solid-phase synthesis and characterised by mass spectrometry without ambiguity. Any reported sample whose measured mass departs substantially from 390 daltons is a different compound or a degraded mixture rather than epitalon.
Epitalon is a synthetic tetrapeptide whose four residues are alanine, glutamate, aspartate and glycine, commonly abbreviated AEDG. Its molecular formula is C14H22N4O9 and its monoisotopic mass is near 390.35 daltons. The peptide carries two acidic side chains, so it is neutral to negatively charged in most aqueous buffers. Published reference summaries usually list it under both spellings, epitalon and epithalon, and treat the two names as the same material.
Discussions in the literature often conflate three distinct entities: the pineal extract epithalamin, the isolated tetrapeptide AEDG, and commercial preparations sold under similar names. Reviews citing older Russian-language studies sometimes omit detail on purity, route of administration and control groups, which makes cross-study comparison difficult. Researchers working with the compound generally note the need for independent replication, standardized enzyme assays, and clearer reporting of peptide identity. These caveats are relevant when weighing claims that appear in secondary sources rather than in primary reports.
（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.
Many industries other than the health industry have used antimicrobial surfaces to keep surfaces clean. The physical nature of the surface or its chemical makeup can be manipulated to create an inhospitable environment for micro-organisms. Photocatalytic materials have been used for their ability to kill many micro-organisms and therefore can be used for self-cleaning surfaces as well as air cleaning, water purification, and antitumor activity.
Hadi's election on 24 February 2012 peacefully introduced a new government in Yemen, with only a small percentage of voters spoiling their ballots in the single-candidate contest. Hadi, a southerner, especially enjoyed support in former South Yemen, quieting the murmurs of separatism, although the Southern Movement boycotted the presidential election, as did the Houthis. Hadi did not give the restive Houthis any seats in his cabinet.
== Career == An outstanding junior excluding one occasion where he was tagged out of the game by Martin Davis (now West Coast Eagles Property manager), Jetta was twice named in the Under 18 All-Australian Team as well as being adjudged the joint winner of the Kevin Sheehan Medal, awarded to the Best Player in Division 1 at the Under 16 National Championships. He was also a graduate of the AIS-AFL Academy in 2005. The speedy forward was drafted by the Bombers with the priority selection (18th overall) in the 2006 AFL draft from South Fremantle. He was drafted as a player renowned for outstanding pace, good foot skill and terrific vision on the ground. He made his AFL debut in the opening round of the 2007 season, along with another of the club's 2006 recruits, Alwyn Davey. Jetta went on to play the following 3 matches before being sidelined by a groin complaint. Despite returning to play with Essendon's VFL affiliate, the Bendigo Bombers, this injury ultimately ended his 2007 season. The 2008 pre-season, saw Jetta return to the club in excellent condition. He equaled the then club record for the 20m sprint with a time of 2.75 seconds, and his skin folds were the lowest they had been. His strong performances in the NAB Cup reflected that increase in fitness. As a result of that good form, Jetta earned selection in Essendon's Round 1 encounter with North Melbourne in which he gathered 13 possessions and showcased his terrific tackling. His good start to the season was interrupted by a hamstring injury sustained in Essendon's round 3 clash with Carlton.
== Use and effects == EiPLA has been identified in blotter containing doses of 86 to 97 μg base equivalent per tab. Blotter containing 200 μg per tab has also been described. Anecdotal reports suggest that EiPLA produces psychedelic effects but is less potent than LSD.
== Cherenkov counting == High-energy beta emitters, such as phosphorus-32 and yttrium-90 can also be counted in a scintillation counter without the cocktail, instead using an aqueous solution containing no scintillators. This technique, known as Cherenkov counting, relies on Cherenkov radiation being detected directly by the photomultiplier tubes. Cherenkov counting benefits from the use of plastic vials which scatter the emitted light, increasing the potential for light to reach the photomultiplier tube.
Sources: en.wikipedia.org
290 aircraft; more than 20,000 employees; 5.2 million square feet of building space (about 90 football fields). the capacity to handle 115 packages per second (equivalent to 416,000 packages flowing through its facilities every hour);
== Description == The adult lesser mealworm beetle is roughly 6 mm long and widely oval in shape. It is shiny black or brown with reddish brown elytra, the color variable among individuals and changing with age. Much of the body surface is dotted with puncture-like impressions. The antennae are paler at the tips and are covered in tiny, yellowish hairs. The elytra have shallow longitudinal grooves. The eggs are narrow, whitish or tan, and about 1.5 mm long. The larvae somewhat resemble other mealworms, such as the common mealworm (Tenebrio molitor), but are smaller, measuring up to 11 mm long at the final subadult stage. They are tapering and segmented, with three pairs of legs toward the front end, and whitish when newly emerged from the egg and darken to a yellow-brown. They become pale when preparing to molt between instar stages six to 11 instars occur.
=== Lifestyle === Besides insulin, the other ways type 1 diabetics control their blood sugar is by learning how various foods and exercise impact their blood sugar levels. This is primarily done by tracking their intake of carbohydrates, the type of food with the greatest impact on blood sugar. In general, people with type 1 diabetes are advised to follow an individualized eating plan rather than a pre-decided one. There are camps for children to teach them how and when to use or monitor their insulin without parental help. As psychological stress may have a negative effect on diabetes, a number of measures have been recommended including: exercising, taking up a new hobby, or joining a charity, among others. Regular exercise is crucial for maintaining overall health, though the effect of exercise on blood sugar can be challenging to predict. Exogenous insulin can drive down blood sugar, leaving those with diabetes at risk of hypoglycemia during and immediately after exercise, then again seven to eleven hours after exercise (called the "lag effect"). Conversely, high-intensity interval exercise (HIIT) can result in a shortage of insulin, and consequent hyperglycemia. The risk of hypoglycemia can be managed by beginning exercise when blood sugar is relatively high (above 100 mg/dL or 5.5 mmol/L), ingesting carbohydrates during or shortly after exercise, and reducing the amount of injected insulin within two hours of the planned exercise.
== The role in human pregnancy == In humans, a certain subtype of cells of the placenta, namely the extravillous trophoblasts, express the enzyme and secrete it into the blood stream of a pregnant woman. During pregnancy, DAO helps maintaining fetal growth and development by regulating histamine levels. DAO levels in the blood circulation increase vastly in pregnant women suggesting a protective mechanism against adverse histamine. Histamine is a potent vasodilator and can cause uterine contractions, which can lead to premature labor. DAO in the placenta breaks down histamine to prevent its accumulation and maintain a healthy pregnancy. Low levels of DAO in the placenta may contribute to preeclampsia, a pregnancy-related disorder characterized by mother's high blood pressure and damage to mother's organs such as the liver and kidneys; the baby may also be affected if the condition is severe or left untreated, but it is not the primary target of the disorder. Lowered diamine oxidase values in maternal blood in early pregnancy might be an indication for trophoblast-related pregnancy disorders like early-onset preeclampsia.
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 built from alanine, glutamate, aspartate and glycine. The four residues are joined by standard peptide bonds, giving a linear chain rather than a branched structure.