If you have been reading about PTMA gene and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2026-06-04. Numbers and descriptions here follow the published literature rather than marketing material.
Clinical research has examined the peptide in chronic hepatitis B and C, as a vaccine adjuvant, and in sepsis and oncology settings. Findings across trials are mixed; some report changes in selected immune markers, while others find no clear clinical benefit. Many studies are small and define outcomes differently, which limits comparison. Regulatory approval is confined to a few countries, and the compound is not an approved drug in the United States or most of Europe.
Overall evidence quality varies considerably. A large share of published reports come from single centers, rely on surrogate immunological markers, or lack adequate control groups. Systematic reviews have highlighted this heterogeneity as a barrier to pooling results. Open questions include which patients, if any, might benefit, what treatment duration is appropriate, and whether any effect is independent of standard care. The peptide is often described as an immune modulator rather than a therapy for one disease, which complicates confirmatory trial design.
Thymosin alpha 1 is approved as a medicine in several countries, including Italy and China, for indications such as chronic hepatitis B and as an immune adjuvant. It is not approved by the United States Food and Drug Administration as a therapeutic product. In research settings the peptide appears in studies of sepsis, vaccine response, and oncology support, often with mixed or inconclusive results. The evidence base is uneven, and reviews note that many trials were small. Regulatory status therefore differs widely between jurisdictions.
Thymosin alpha 1 is a synthetic 28-amino-acid peptide first isolated in 1966 from thymosin fraction 5, a bovine thymus extract. Its chain begins with an acetylated serine residue and ends with asparagine. The native peptide carries a molecular mass near 3,108 daltons. Researchers classify it as an immunomodulatory agent rather than a hormone with a single endocrine target. Early work framed it as a thymus-derived factor that supports T-cell maturation. The synthetic form used in research and clinical products matches the natural sequence.
| Property | Value | Notes |
|---|---|---|
| First described | 1977 | Reported as a component of thymosin fraction 5 |
| Sequence length | 28 amino acids | N-terminal residue is acetylated |
| Net charge at neutral pH | Negative | Reflects a high proportion of acidic residues |
| Principal studied uses | Chronic hepatitis B and vaccine adjuvant | Research uses outnumber approved indications |
| Regulatory status | Approved in a limited number of countries | Not approved in the United States or most of Europe |
Stability depends on temperature, pH, and the number of freeze-thaw events the sample has experienced. Freeze-dried material is commonly held at -20 °C or colder, while reconstituted liquid is kept cold and used within a short window. Extreme pH and prolonged light exposure can promote deamidation, oxidation, or aggregation, particularly at asparagine and methionine positions. Adsorption to container walls can lower the measured concentration of a dilute solution even when the peptide molecules themselves remain intact.
Identity and purity are usually assessed by reversed-phase high-performance liquid chromatography, which separates the target peptide from truncated or chemically modified byproducts. Mass spectrometry confirms the expected molecular mass and can indicate acetylation state or sequence errors. Amino acid analysis and peptide mapping supply complementary sequence-level information, while endotoxin testing is relevant for preparations intended for cell or animal work. Purity figures reported by suppliers refer to the method used and are not directly comparable across laboratories unless conditions are stated.
Thymosin alpha-1 is a synthetic 28-amino-acid peptide whose sequence was first identified in extracts of bovine thymus tissue during the 1970s. The chain carries an acetyl group on its N-terminal serine. Its acidic residue content is high, which produces strong water solubility and an isoelectric point well below neutrality. Material supplied for laboratory and clinical use is manufactured by solid-phase peptide synthesis rather than purified from animal tissue. Different salt forms, such as the acetate, alter the counter-ion content without changing the peptide backbone.
Whether the free 28-residue peptide circulates in human tissue remains debated. The best-documented human source is prothymosin alpha, a larger acidic protein that carries the sequence at its N-terminus. Reports of measurable peptide levels in serum and lymphoid tissue exist, yet some of that signal may come from cross-reacting fragments or from the parent protein. Most reviews therefore treat prothymosin alpha as the established human molecule and describe independent circulation of the small peptide as an unresolved question.
Thymosin alpha 1 is a short peptide first isolated from bovine thymus tissue in the early 1970s during fractionation work aimed at identifying factors that influence T cell development. It belongs to a family of acidic thymic peptides, and the original preparations contained several components that were later separated by chromatography. The compound is now produced synthetically rather than extracted from tissue, which removes batch variability tied to animal sourcing. Researchers describe it as an immunomodulatory peptide because laboratory studies show effects on several cell types of the innate and adaptive immune systems.
The molecule consists of 28 amino acid residues with an acetyl group attached to the N-terminal serine. Its sequence is acidic overall, with several glutamic and aspartic acid residues distributed along the chain and no cysteine, so disulfide bridges do not form. The peptide carries a net negative charge at physiological pH. Because the N-terminus is blocked, the intact molecule resists degradation by many aminopeptidases, which contributes to its stability in biological fluids.
The peptide is generated in cells by cleavage of prothymosin alpha, a larger acidic protein encoded by the PTMA gene. Prothymosin alpha is expressed in many tissues, not only in the thymus, and its functions include nuclear roles in chromatin-related processes. The 28-residue fragment corresponds to the N-terminal portion of that precursor. How the cleavage occurs and how the fragment's concentration is regulated remain open questions; circulating amounts are small and difficult to measure reliably with routine assays.
Though commercial breeding would seem to insulate wild populations, it can stoke the demand for them and increase wild captures. Even the potentially appealing concept of raising turtles at a farm to release into the wild is questioned by some veterinarians who have had some experience with farm operations. They caution that this may introduce into the wild populations infectious diseases that occur on the farm, but have not (yet) been occurring in the wild.
Any public or private entity or agency or medical or dental facility where clinical trials are conducted. (ICH E6) Any public or private entity or agency (including Federal, State, and other agencies). (21CFR50.3) Institutional Review Board (IRB)
After the Iraqi government was overthrown in the 2003 invasion of Iraq, Galloway defended Iraqi insurgents targeting Western forces. In August 2005, he praised them as "martyrs", condemned Iraqis who worked with the new security forces as "collaborators" and said it was "normal" for them to be the targets of suicide bombers. He said: "These poor Iraqis – ragged people, with their sandals, with their Kalashnikovs, with the lightest and most basic of weapons – are writing the names of their cities and towns in the stars, with 145 military operations every day, which has made the country ungovernable. We don't know who they are, we don't know their names, we never saw their faces, they don't put up photographs of their martyrs, we don't know the names of their leaders". Galloway was challenged by the BBC but denied making the "martyrs" comment. Concerning the Iraq War, he said he would not rest "until Tony Blair is brought to justice", and in 2019 announced plans to try to prosecute Alastair Campbell.
Low-end restaurants and street vendors are the biggest end users of gutter oil, as they operate with lower profit margins than bigger restaurants. Oil is a large kitchen supply cost for some restaurants, so obtaining cheaper oil can allow a marginal restaurant to reduce its overall expenses. Chinese food is generally heavily dependent on oil due to most foods being fried, so cheaper meal prices for many price-sensitive consumers are possible if gutter oil is used instead of virgin oil. The situation becomes more serious because it is hard to distinguish reprocessed gutter oil from legitimate oil. Bleach is used to transform gutter oil's dark color into a more natural-looking one, and alkali additives are used to neutralize the abnormal pH caused by high concentrations of animal fats. Used kitchen oil can be purchased for between US$859 and US$937 per ton, while the cleaned and refined product can sell for US$1,560 per ton. Thus there is great economic incentive to produce and sell gutter oil.
The water normally used to quench steel will also be in short supply, and require strong agitation. Casting steel can be a difficult process in microgravity, requiring special heating and injection processes, or spin forming. Heating can be performed using sunlight combined with electrical heaters. The casting process would also need to be managed to avoid the formation of voids as the steel cools and shrinks. Various metal-working techniques can be used to shape the metal into the desired form. The standard methods are casting, drawing, forging, machining, rolling, and welding. Both rolling and drawing metals require heating and subsequent cooling. Forging and extrusion can require powered presses, as gravity is not available. Electron beam welding has already been demonstrated on board the Skylab, and will probably be the method of choice in space. Machining operations can require precision tools which will need to be imported from the Earth for some duration. New space manufacturing technologies are being studied at places such as Marshall's National Center for Advanced Manufacturing. The methods being investigated include coatings that can be sprayed on surfaces in space using a combination of heat and kinetic energy, and electron beam free form fabrication of parts. Approaches such as these, as well as examination of material properties that can be investigated in an orbiting laboratory, will be studied on the International Space Station by NASA and Made In Space, Inc.
Sources: en.wikipedia.org
This stirred up a wave of protest among the Catholic population, and bishops, Catholic organisations and the Centre Party itself united to combat the "red danger". This conflict bridged internal tensions within the party and secured its continual existence despite the turmoil of the revolution. The party however was weakened by its Bavarian wing splitting off and forming the Bavarian People's Party (BVP), which emphasised autonomy of the states and also took a more conservative course. In the 1919 elections for the Weimar National Assembly, the Centre Party gained 91 representatives, being the second largest party after the Social Democratic Party (SPD). The Centre's Constantin Fehrenbach was elected president of the National Assembly. The party actively cooperated with Social Democrats and left-liberal German Democratic Party (DDP) in drawing up the Weimar Constitution, which guaranteed what the Centre had been fighting for since its founding: equality for Catholics and autonomy for Catholic Church throughout Germany. The party was less successful in the school question. Although religious education remained an ordinary subject in most schools, the comprehensive, inter-denominational schools became default.
Some quantum dots are small regions of one material buried in another with a larger band gap. These can be so-called core–shell structures, for example, with CdSe in the core and ZnS in the shell, or from special forms of silica called ormosil. Sub-monolayer shells can also be effective ways of passivating the quantum dots, such as PbS cores with sub-monolayer CdS shells. Quantum dots sometimes occur spontaneously in quantum well structures due to monolayer fluctuations in the well's thickness.
In the two weeks prior to the disappearance he created a total obsession with him, he didn't leave him alone". After speaking against Dias, Silva said that he and the other witnesses were scared and did not receive police protection. In 2011, João André Mendonça that when he was giving his testimony in GNR (Republican National Guard) in 1998, Dias asked him to "not open his mouth" and that "the authorities should close the borders (...) Maybe they still have time". In 2012, Paulo Gomes, Dias' lawyer, declared that "Mister Afonso isn't talking because his freedom is on the line". In the same year Dias said that he was going to talk about what happened with Rui Pedro, but he would do it outside of the courtroom. In an interview to Grande Revista of RTP in 2012, he said that he does not talk more because of all the help he gave to authorities that only served for his prosecution thirteen years later. When questioned about Rui Pedro he answered after a long silence: "As I see it... I don't know... three weeks after another kid went missing in Famalicão. Either it was a kidnapping or he fell in a well... I don't know". Later (in 2018), he said he did not have a theory on what happened with the boy. Ricardo Sá Fernandes, Mendonça family's lawyer, stated in 2017: "I keep saying that what I would really like is for Afonso Dias to tell us what happened with Rui Pedro after they left the prostitute. But he didn't say anything in court, and continues to not reveal what I would like for him to reveal. And, I repeat, what I would really like would be for him to say what he knows."
Examples of iron-containing proteins in higher organisms include hemoglobin, cytochrome (see high-valent iron), and catalase. The average adult human contains about 0.005% body weight of iron, or about four grams, of which three quarters is in hemoglobin—a level that remains constant despite only about one milligram of iron being absorbed each day, because the human body recycles its hemoglobin for the iron content. Microbial growth may be assisted by oxidation of iron(II) or by reduction of iron(III).
Sources: en.wikipedia.org
The medal table is based on information provided by the International Olympic Committee (IOC) and is consistent with IOC conventional sorting in its published medal tables. The table uses the Olympic medal table sorting method. By default, the table is ordered by the number of gold medals the athletes from a nation have won, where a nation is an entity represented by a NOC. The number of silver medals is taken into consideration next and then the number of bronze medals. If teams are still tied, equal ranking is given and they are listed alphabetically by their IOC country code. Events in boxing result in a bronze medal being awarded to each of the two competitors who lose their semi-final matches, as opposed to them fighting in a third place tie breaker. Other combat sports, which include, judo, taekwondo, and wrestling, use a repechage system which also results in two bronze medals being awarded. Two gold medals and no silver medals were awarded due to a first-place tie in the women's 100 metre freestyle swimming event, while three silver medals and no bronze medals were awarded due to a second-place tie in the men's 100 metre butterfly swimming event. Additionally, two bronze medals were awarded for a third-place tie in the women's 100 metre backstroke swimming and in the men's K-1 200 metres canoeing events. Nijat Rahimov of Kazakhstan originally won the gold medal in men's 77 kg weightlifting but was disqualified in March 2022 by the Court of Arbitration for Sport (CAS) for doping violations.
=== Upstanders === In September 2016, Starbucks announced a debut of its first-ever original content series called "Upstanders", which aimed to be inspirational. The series featured podcasts, written word, and video, and was distributed via the Starbucks mobile app, online, and through the company's in-store digital network.
Instead the liver is strongly stimulated to manufacture glucose from glycogen (through glycogenolysis) and from non-carbohydrate sources (such as lactate and de-aminated amino acids) using a process known as gluconeogenesis. The glucose thus produced is discharged into the blood correcting the detected error (hypoglycemia). The glycogen stored in muscles remains in the muscles, and is only broken down, during exercise, to glucose-6-phosphate and thence to pyruvate to be fed into the citric acid cycle or turned into lactate. It is only the lactate and the waste products of the citric acid cycle that are returned to the blood. The liver can take up only the lactate, and, by the process of energy-consuming gluconeogenesis, convert it back to glucose.
Sources: en.wikipedia.org
Trials differ in patient population, dose schedule, background treatment, and the endpoints used to judge success. Many are small and single-center, so random variation can dominate the reported effects.
Authorization is limited to a small number of countries and covers specific indications such as chronic hepatitis B and vaccine adjuvant use. Availability and labelling differ by jurisdiction.
Most reviews describe it as an immunomodulatory agent with an uncertain clinical effect. They generally call for larger, better-controlled trials before firm conclusions are drawn.
It is a chain of 28 amino acids, with an acetyl group attached to the first serine residue. The synthetic version replicates this sequence. Its molecular mass is about 3,108 daltons.