Everything below concerns Tetrapeptide. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-11-28. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Derived from the four constituent residues |
| Molecular mass | About 390.35 Da | Monoisotopic value, confirmed by mass spectrometry |
| Residue sequence | Ala-Glu-Asp-Gly | Read from the N-terminus to the C-terminus |
| Common synonyms | Epithalon; AEDG | Both forms appear in reference catalogues |
| Net charge near neutral pH | Negative | Two acidic side chains give a low isoelectric point |
Several names circulate for the same molecule, including epitalon, epithalone, epithalamin tetrapeptide, and the sequence code AEDG. A CAS registry number, 307297-39-8, is commonly cited for it, though catalogue entries should be checked against supplier documentation because mislabelled records occur. In its usual form the peptide carries free amino and carboxyl termini and is neither glycosylated nor lipidated. Researchers distinguish the defined tetrapeptide from epithalamin itself, a crude pineal preparation containing many peptides that is not chemically characterised.
Material supplied for laboratory use is normally a lyophilised white to off-white powder that dissolves readily in water and in isotonic saline. Lyophilised cakes are hygroscopic and should be equilibrated to room temperature before opening to limit condensation on the solid. Solutions are typically prepared at milligram-per-millilitre concentrations and divided into single-use aliquots, because repeated freeze–thaw cycles degrade short peptides. Aqueous solutions are far less stable than the dry powder, and identity is usually verified by mass spectrometry alongside purity estimation from reversed-phase high-performance liquid chromatography.
Epitalon is a synthetic linear tetrapeptide with the sequence alanine–glutamate–aspartate–glycine, abbreviated AEDG. Its molecular formula is C14H22N4O9 and the calculated mass is approximately 390.35 g/mol. The compound is made by solid-phase peptide synthesis rather than extracted from tissue, although early work described it as a short fragment of a peptide fraction obtained from bovine pineal extract. In the research literature the spelling epitalon and the variant epithalone both appear, while AEDG is the standard code used in peptide nomenclature.
Epitalon is a synthetic tetrapeptide whose sequence is alanine–glutamate–aspartate–glycine, commonly abbreviated AEDG. It was developed in Russia during the 1980s and 1990s by investigators associated with the St. Petersburg Institute of Bioregulation and Gerontology, who studied short peptides as regulators of gene expression and tissue function. The alternative spelling epithalon appears interchangeably in the literature, and the two names refer to the same molecule. Outside Russia it is encountered chiefly as a research chemical rather than a licensed medicine, and it holds no approval from the United States Food and Drug Administration or the European Medicines Agency.
The peptide is a synthetic analogue of epithalamin, a preparation extracted from bovine pineal glands. Investigators sought a short, chemically defined molecule that would reproduce some of the endocrine and gerontological observations attributed to the glandular extract. Proposed mechanisms centre on induction of telomerase activity, an effect reported in cultured human somatic cells in the early 2000s, together with influences on melatonin secretion and neuroendocrine regulation. Those mechanisms remain incompletely characterised, and the reported telomerase response has not been consistently reproduced by independent groups working in comparable systems.
Radio Free Europe was a product of some of the most prominent architects of America's early Cold War strategy, especially those who believed that the Cold War would eventually be fought by political rather than military means, such as George F. Kennan. Soviet and Eastern Bloc authorities used various methods to suppress Western broadcasts, including radio jamming. American policymakers, including Kennan and John Foster Dulles, acknowledged that the Cold War was in its essence a war of ideas. The United States, acting through the CIA, funded a long list of projects to counter the communist appeal among intellectuals in Europe and the developing world. The CIA also covertly sponsored a domestic propaganda campaign called Crusade for Freedom.
=== Legal action === In May 2019, in the first successful prosecution of top pharmaceutical executives for crimes related to the prescribing of opioids, the founder and four former executives of Insys Therapeutics Inc. were convicted by a federal jury in Boston in connection with bribing medical practitioners to prescribe Subsys, a highly-addictive sublingual fentanyl spray intended for cancer patients experiencing breakthrough pain, and for defrauding Medicare and private insurance carriers. The company declared bankruptcy about two weeks after they lost the case. Dozens of states are suing pharmaceutical companies, accusing them of causing the epidemic. Suits filed by almost 2,000 cities, counties, and tribal lands have been rolled into a single federal case scheduled to be heard in Fall 2019. In the first state case to reach a decision, on August 26, 2019, Oklahoma district court judge Thad Balkman found the pharmaceutical company Johnson & Johnson responsible for creating a "public nuisance" under state law, and ordered the company to pay a fine of $572 million. The company said they will appeal. Two other drug makers had previously settled with the state of Oklahoma. Purdue Pharma, the maker of OxyContin, agreed to a fine of $270 million in March 2019, and Teva Pharmaceuticals, which makes generic drugs, agreed to pay $85 million in May.
Crocodile oil use in India is recorded in other journals, specifically, the oil is prepared by the Sanif tribe of the Punjab, who eat crocodile fat. They state crocodile oil contains larger amounts of "solidifiable fat" than any fish oil. The journal also mentions the oil to be procurable in abundance in Agra. Similarly, a journal published by Royal Society of Arts in 1879 discussed the commercial value of crocodile oil as well as how the oil was used in the nineteenth century specifically in Agra, India. A Western researcher determined that crocodile oil contained a larger proportion of solid fat either cod liver or fish oils. They softened the quality of various animal oils on leather and found leather treated with crocodile oil remained stiffer compared to other natural oils. Melted fat of crocodile or crocodile oil was also recorded to be used for "gastric obstructions". Nature, in 1886, refers to the use of crocodile oil in Germany for leather dressing, prepared in Punjab and solidified at 33 degrees. Chinese traditional medicine as well as Southeast Asian traditional medicine uses crocodile oil and products as ointments for burns and scalds. A study tested burn wound-healing efficacy of crocodile oil through a Chinese herbal medicine called crocodile oil burn ointment, consisting of crocodile oil, natural mineral and extraction of other herbal medicines by employing second-degree burns in rats and found crocodile oil enhances burn wound healing capabilities.
=== Sustainable seafood guides === Good Fish Guide at the Marine Conservation Society (Europe) Seafood Watch at the Monterey Bay Aquarium (United States) Search Sustainable Seafood at Oceanwise (Canada) Sustainable Seafood Guide at GoodFish (Australia)
== Fireproof vaults == Fireproof vaults protecting paper documents are built of concrete or masonry. The Municipal Code of Chicago, in its flammable-liquids chapter, defines a standard fireproof vault as a room whose walls, floor and ceilings are built of reinforced concrete or masonry of not less than two-hour fire-resistive construction. NFPA 232, a U.S. standard for the protection of records, defines a standard records vault as a completely fire-resistive enclosure used exclusively for records storage, and requires that its walls be noncombustible and of fire-resistive construction throughout. In the event of a fire, steam is released into the chamber of a concrete vault, rapidly raising the temperature to 212 °F (100 °C) and the relative humidity to 100%. Concrete vaults are not listed for the storage of non-paper media, because the steam that concrete releases in a fire drives the interior beyond the temperature and humidity limits that the UL 72 test procedure sets for media. The UL 72 classification of records-protection equipment, as restated in NFPA 232, sets the interior temperature and relative-humidity limits that must not be exceeded during the rated time of a standard fire test, the three classes being:
Sources: en.wikipedia.org
Pro-gastrin-releasing-peptide, also known as Pro-GRP, is a gastrin-releasing peptide (GRP) precursor, a neurotransmitter that belongs to the bombesin-related neuromedin B family. GRP stimulates the secretion of gastrin in order to increase the acidity of the gastric acid. Pro-GRP is a peptide composed of 125 amino acids, expressed in the nervous system and digestive tract. It is different from progastrin, consisting of 80 amino acids, precursor of gastrin in its intracellular version and oncogene in its extracellular version (hPG80). The presence of GRP in lung cancer samples was identified in 1983. In pathological situations, GRP has mitogenic activity in vitro in many cancers including pancreatic cancer, small cell lung carcinoma, prostate cancer, kidney cancer, breast and colorectal cancer. GRP could operate as an autocrine growth factor. In cancers, GRP induces cell growth and inhibits apoptosis by shutting down the endoplasmic reticulum stress pathway. The mechanisms of the impacted signal pathways have not been established. As early as 1994, research on Pro-GRP as a biomarker for small-cell lung carcinoma began. Because of the very short half-life of GRP (2 minutes), the Pro-GRP is used for measurements and analysis. Since then, Pro-GRP has been used as a tumor marker for patients with small-cell lung carcinoma in limited and extended stages.
We are giving them to the elected government of Palestine", adding that he would personally donate three cars and £25,000 to Hamas organisation "Prime Minister" Ismail Haniyeh. On 8 April 2009, Galloway joined Vietnam War veteran Ron Kovic to launch Viva Palestina US. A third Viva Palestina convoy began travelling at the end of 2009. On 8 January 2010, Galloway and his colleague Ron McKay were deported from Egypt immediately following their entry from Gaza. They had been attempting to help take about 200 aid trucks into the Gaza Strip. They were driven by the police to the airport and placed on a plane bound for London. The Foreign Ministry of Egypt released a statement reading: "George Galloway is considered persona non grata and will not be allowed to enter into Egypt again". Shortly after his deportation, Galloway said, "It is a badge of honour to be deported by a dictatorship" and "I've been thrown out of better joints than that." Viva Palestina was registered as a charity in April 2009 but, following its continued non-submission of accounts, ceased to be recognised as a charitable organisation in November 2013. It was taken over by the Charity Commission in October 2014, which appointed an accountant to oversee the group because of the concerns over its financial management.
The State Council said inspectors would target edible oil trade fairs and wholesale markets and called for inspections of oil being used at restaurants, school cafeterias, work canteens and kitchens at construction sites. The State Council also stated that businesses that use recycled oil would be forced to close temporarily or lose their business license while peddlers who sell the oil could be criminally prosecuted. In October 2013, a man from eastern China's Jiangsu Province was sentenced to life imprisonment for profiting heavily from making and selling gutter oil. In January 2014, Zhu Chuanfeng was sentenced to death with a two-year reprieve, and his brothers Zhu Chuanqing and Zhu Chuanbo were sentenced to life in prison for selling gutter oil.
antioncogene A gene which helps to regulate cell growth and suppress tumors when functioning correctly, such that its absence or malfunction can result in uncontrolled cell growth and possibly cancer. Compare oncogene.
Sources: en.wikipedia.org
It is a four-amino-acid peptide built from alanine, glutamate, aspartate and glycine in that order. Its formula is C14H22N4O9, and it is made by chemical synthesis rather than extracted from tissue. The synthetic peptide is a single defined molecule, unlike the pineal extracts it is often compared with.
No. The two spellings refer to the same tetrapeptide, and the difference reflects transliteration from Russian. Laboratories and catalogues use both forms interchangeably. The material is also indexed as AEDG, taken from the one-letter codes of its residues.
Epithalamin is a mixed preparation derived from animal pineal tissue and contains many peptides. Epitalon is one synthetic sequence chosen for study from that broader mixture. Statements about one do not transfer directly to the other.
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.