Everything below concerns Thymosin fraction 5. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-10-15. Numbers and descriptions here follow the published literature rather than marketing material.
Laboratory work indicates that the peptide acts on cells of both the innate and adaptive immune systems. Reported effects include signalling through Toll-like receptors on dendritic cells, enhanced T-cell maturation, and increased natural killer cell activity. These actions are described largely from cell-culture and animal experiments, and the precise receptor-level events remain incompletely defined. Studies in humans have generally measured immune markers rather than a single defined molecular target. The resulting picture remains partly descriptive.
Clinical research has examined the peptide in chronic hepatitis B and C, as a vaccine adjuvant, and in sepsis and oncology settings. Results across trials have been mixed, and several studies were small or conducted under differing protocols. Regulatory status varies by country, and the compound is not approved in every jurisdiction where it is studied. Evidence for any single indication should be read with attention to sample size and endpoint choice.
Thymosin alpha-1 is a 28-residue peptide first isolated from thymus tissue in the 1970s. It corresponds to the N-terminal portion of thymosin beta-4, from which it is cleaved in vivo. The peptide carries an acetyl group at its N-terminus, a modification that affects its charge and stability. Synthetic material produced by solid-phase peptide synthesis is chemically identical to the natural fragment and is the form used in research and clinical studies.
Identity and purity are assessed with a small set of standard peptide methods. Reversed-phase high-performance liquid chromatography separates the main peak from truncated or oxidized species, and its area percentage is the usual purity measure. Mass spectrometry confirms the observed molecular mass against the expected value, while amino acid analysis or peptide mapping checks composition and sequence. Specifications for research-grade material are often stated as 95 percent or higher, though the exact limit depends on the supplier and the intended use.
Laboratory supplies of the peptide usually arrive as a lyophilized powder in sealed vials. The powder is hygroscopic, so a vial should be allowed to reach room temperature before it is opened to prevent condensation on the contents. Weighing and transfer are best performed in a low-humidity environment with clean tools. Once dissolved, the solution should be mixed gently rather than vortexed, because foaming and shear can reduce recovery of the peptide.
Storage recommendations center on low temperature, dryness, and protection from repeated freezing and thawing. The intact powder is commonly held at 20 degrees below zero Celsius or colder, while a working solution is divided into single-use aliquots to limit freeze-thaw cycles. Buffered saline or phosphate-buffered saline at neutral pH is frequently used as a diluent. Light sensitivity is not well documented, yet amber vials or foil wrapping are common practice for long-term storage of peptide stocks.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Peptide | 28 amino acid residues |
| Molecular weight | Approximately 3108 Da | Depends on acetylation state |
| N-terminal modification | Acetylated | Affects charge and stability |
| Natural source | Fragment of thymosin beta-4 | Cleaved in vivo |
| Sequence length | 28 residues | Synthetic form matches natural |
The peptide was identified during work in the 1970s on thymosin fraction 5, a partially purified extract of calf thymus. Investigators separated that mixture and characterized individual components, one of which they named thymosin alpha-1. The same compound later received the international nonproprietary name thymalfasin. Commercial material is produced by solid-phase peptide synthesis rather than by extraction, so synthetic and natural forms share an identical sequence. Naming conventions vary across the literature, and readers should distinguish the alpha-1 peptide from other thymosins that have unrelated sequences and functions.
Thymosin beta-4 is a separate 43-residue peptide that binds actin and participates in cell migration; it shares no sequence similarity with thymosin alpha-1 despite the common family name. Other preparative materials, such as thymosin fraction 5 and thymopoietin, contain distinct mixtures or peptides. The shared thymosin label reflects the tissue of origin used in early purification, not a common structural core. Treating these molecules as interchangeable is a frequent source of confusion in laboratory reports and in popular summaries alike.
Quality control for thymosin alpha-1 focuses on identity, purity, and potency. Identity is confirmed by mass spectrometry and amino acid analysis, while purity is assessed by chromatography with limits on related substances and residual solvents. Potency assays may use cell-based immune readouts, but these are not standardized across laboratories. Regulatory status differs by jurisdiction; no product is approved in the United States for clinical use, whereas some other countries register injectable forms for specific indications.
Quantifying thymosin alpha-1 in a sample usually relies on reverse-phase high-performance liquid chromatography. The peptide lacks strong chromophores, so detection often occurs at 214 nm, where the peptide backbone absorbs. Mass spectrometry provides confirmatory identification and can detect sequence variants or truncations. Immunoassays have been used in biological matrices, but they may cross-react with related fragments. For purity assessment, chromatographic peak area gives the main component percentage, while mass accuracy verifies molecular identity.
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.
Immunological studies connect the peptide to multiple parts of the immune response. It has been reported to engage Toll-like receptor signaling, to promote dendritic cell maturation, and to influence the balance of T helper cell subsets. Changes in natural killer cell activity and in cytokine release appear in cell culture and animal models. These observations describe broad immunomodulatory behavior rather than a single defined receptor target, and the primary molecular interaction has not been settled.
== History == Phenibut was synthesized at the A. I. Herzen Leningrad Pedagogical Institute (USSR) by Professor Vsevolod Perekalin's team and tested at the Institute of Experimental Medicine, USSR Academy of Medical Sciences. It was introduced into clinical use in Russia in the 1960s.
Velmanase alfa, sold under the brand name Lamzede, is a medication used for the treatment of alpha-mannosidosis. Velmanase alfa is a recombinant human lysosomal alpha-mannosidase. The most common adverse reactions include hypersensitivity reactions including anaphylaxis, a severe, potentially life-threatening allergic reaction. Velmanase alfa was approved for medical use in the European Union in March 2018, and in the United States in February 2023. Velmanase alfa is the first enzyme replacement therapy approved in the US for the treatment of the non-central nervous system manifestations of alpha-mannosidosis. The US Food and Drug Administration (FDA) considers it to be a first-in-class medication.
== In biochemistry == Many biologically active molecules are chiral, including the naturally occurring amino acids (the building blocks of proteins) and sugars. The origin of this homochirality in biology is the subject of much debate. Most scientists believe that Earth life's "choice" of chirality was purely random, and that if carbon-based life forms exist elsewhere in the universe, their chemistry could theoretically have opposite chirality. However, there is some suggestion that early amino acids could have formed in comet dust. In this case, circularly polarised radiation (which makes up 17% of stellar radiation) could have caused the selective destruction of one chirality of amino acids, leading to a selection bias which ultimately resulted in all life on Earth being homochiral. Enzymes, which are chiral, often distinguish between the two enantiomers of a chiral substrate. One could imagine an enzyme as having a glove-like cavity that binds a substrate. If this glove is right-handed, then one enantiomer will fit inside and be bound, whereas the other enantiomer will have a poor fit and is unlikely to bind. L-forms of amino acids tend to be tasteless, whereas D-forms tend to taste sweet. Spearmint leaves contain the L-enantiomer of the chemical carvone or R-(−)-carvone and caraway seeds contain the D-enantiomer or S-(+)-carvone. The two smell different to most people because our olfactory receptors are chiral.
Two days later, the same crew and machine set FAI records for flying payloads of 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 and 80-tonne payloads over a 1,000 km closed circuit at an average of 962 km/h. Of these 18 records, one was broken by a Tu-144 in 1983, five were superseded or discontinued and 12 still stood in 2010. In September 1982 the type made a sales call on Bulgaria, followed by calls in July 1983 on Hungary and Czechoslovakia. Potential buyers received no hard information on the type in advance. Little solid information was given during the sales calls: "constructor Novosilov sidestepped all questions [on fuel consumption] ... [the] chief pilot ... provided a measure of veiled explanation: 'The consumption of the Il-86 is not higher than that of the Il-18,' he said." While welcomed as “proof of friendship with the USSR,” these sales calls failed to attract orders. Observers tacitly noted that the aircraft marked a 10/15-year lag by Soviet civil aviation compared with the West.
=== Current Applications === Voltage gated sodium channels have been used as therapeutic targets in various modes of research, allowing versutoxin to also be used in the process. Some notable diseases versutoxin has been used as a potential therapeutic tool in include: Alzheimer's disease, Parkinson's disease, brain ischemia, glaucoma, and sclerosis. Versutoxin has also been used in biopesticide research. The structure of recombinant Nemertide α-1 (a neurotoxin found in carnivorous marine ribbon worms) was compared against recombinant delta-hexatoxin-Hv1 due to their similar VSGC targeting abilities. However, as of right now, not enough research has been done about the off target effects.
Sources: en.wikipedia.org
=== In microalgal biofilms === EPS is found in the matrix of other microbial biofilms such as microalgal biofilms. The formation of biofilm and structure of EPS share a lot of similarities with bacterial ones. The formation of biofilm starts with reversible absorption of floating cells to the surface. Followed by production of EPS, the adsorption will get irreversible. EPS will colonize the cells at the surface with hydrogen bonding. Replication of early colonizers will be facilitated by the presence of organic molecules in the matrix which will provide nutrients to the algal cells. As the colonizers are reproducing, the biofilm grows and becomes a 3-dimensional structure. Microalgal biofilms consist of 90% EPS and 10% algal cells. Algal EPS has similar components to the bacterial one; it is made up of proteins, phospholipids, polysaccharides, nucleic acids, humic substances, uronic acids and some functional groups, such as phosphoric, carboxylic, hydroxyl and amino groups. Algal cells consume EPS as their source of energy and carbon. Furthermore, EPS protects them from dehydration and reinforces the adhesion of the cells to the surface. In algal biofilms, EPS has two sub-categories; soluble EPS (sEPS) and the bounded EPS (bEPS) with former being distributed in the medium and the latter being attached to the algal cells. Bounded EPS can be further subdivided to tightly bounded EPS (TB-EPS) and loosely bounded EPS (LB-EPS). Several factors contribute to the composition of EPS including species, substrate type, nutrient availability, temperature, pH and light intensity.
The cabal produced a 200-page design document detailing nearly every aspect of the game. They also produced a 30-page document for the narrative, and hired the science fiction novelist Marc Laidlaw to help manage the script. Laidlaw said his contribution was to add "old storytelling tricks" to the team's ambitious designs: "I was in awe of [the team]. It felt to me like I was just borrowing from old standards while they were the ones doing something truly new." Rather than dictate narrative elements "from some kind of ivory tower of authorial inspiration", he worked with the team to improvise ideas, and was inspired by their experiments. For example, he conceived the opening train ride after an engineer implemented train code for another concept. Valve initially planned to use traditional cutscenes, but switched to a continuous first-person perspective for lack of time. Laidlaw said they discovered unexpected advantages in this approach, as it created a sense of immersion and enforced a sense of loneliness in a frightening environment. Laidlaw felt that non-player characters were unnecessary to guide players if the design had sufficiently strong "visual grammar", and that this allowed the characters to "feel like characters instead of signposts". An early version of Half-Life began immediately after the disaster, with the environments already wrecked. Laidlaw worked with Johnson to create versions of the lab environment before the disaster to help set the story.
Actinides seem to be a little less hard than lanthanides, probably due to a longer spatial extent of 5f atomic orbitals with respect to 4f ones, then a selective separation is possible thanks to ligands bearing soft donors such as nitrogen and sulfur atoms, by a different bonding nature compared to hard donors. Despite the potential separation of actinides, a direct extraction from the PUREX raffinate is very hard, due to the presence of many other interfering species in the feed such as activation and fission products. In this perspective, advanced separation processes involving very selective extracting agents are required to achieve an efficient partitioning for the following transmutation process. To sum up, knowledge of hydration, acid-base interactions, kinetics and thermodynamic stabilities and speciation of actinide and lanthanide ions with ligands is of great value to understand a solvent extraction process and to design new and promising extracting agents.
Triglycerides stored in adipose tissue and in other tissues, such as muscle and liver, release fatty acids and glycerol in a process known as lipolysis. Fatty acids are slower than glucose to convert into acetyl-CoA, as first it has to go through beta oxidation. It takes about 10 minutes for fatty acids to sufficiently produce ATP. Fatty acids are the primary fuel source at rest and in low to moderate intensity exercise. Though slower than glucose, its yield is much higher. One molecule of glucose produces through aerobic glycolysis a net of 30-32 ATP; whereas a fatty acid can produce through beta oxidation a net of approximately 100 ATP depending on the type of fatty acid. For example, palmitic acid can produce a net of 106 ATP.
Sources: en.wikipedia.org
== Applications == LbL has found applications in protein purification, corrosion control, (photo)electrocatalysis, biomedical applications, ultrastrong materials, and many more. LbL composites from graphene oxide harbingered the appearance of numerous graphene and graphene oxide composites later on. The first use of reduced graphene oxide composites for lithium batteries was also demonstrated with LbL multilayers.
== Ethylene derivatives == These are generally mustard oils, which are characterized by a burning taste; their principal occurrence is in mustard and Tropaeolum seeds. Sinigrin, or the potassium salt of inyronic acid not only occurs in mustard seed, but also in black pepper and in horseradish root. Hydrolysis with barium hydroxide, or decomposition by the ferment myrosin, gives glucose, allyl mustard oil and potassium hydroxide. Sinalbin occurs in white pepper; it decomposes to the mustard oil, glucose and sinapin, a compound of choline and sinapic acid. Jalapin or Scammonin occurs in scammony; it hydrolyses to glucose and jalapinolic acid.
Overall, expression of c1orf27 seems to be ubiquitous. Highest expression body sites (>50 TPM) were bladder, bone marrow, kidney, liver, pancreas, parathyroid, and vascular. Highest expression health sites (>50 TPM) were adrenal tumors, cervical tumors, and liver tumors. While both of these observations had relatively high TPM scores, there was still relatively low occurrence. This validates the assumption that expression is ubiquitous. There was moderate expression (>25 TPM) in the human fetus, and expression increased with age. Expression was completely absent in the ears, esophagus, lymph, nerve, salivary glands, thyroid, tonsils, and umbilical cord. There was no expression in bladder carcinoma despite expression being elevated in the bladder itself. There was high expression in endothelial cells and neuronal cells but was undetectable in glial cells and neuropil cells. Expression was also localized to the nucleoplasm and plasma membrane in humans but is localized to the cytosol in mice.
== History == The predecessor to the CAD, termed an evaporative electrical detector, was first described by Kaufman in 2002 at TSI Inc in US patent 6,568,245 and was based on the coupling of liquid chromatographic approaches to TSI's electrical aerosol measurement (EAM) technology. At around the same time Dixon and Peterson at California State University were investigating the coupling of liquid chromatography to an earlier version of TSI's EAM technology, which they called an aerosol charge detector. Subsequent collaboration between TSI and ESA Biosciences Inc. (now part of Thermo Fisher Scientific), led to the first commercial instrument, the Corona CAD, which received both the Pittsburgh Conference Silver Pittcon Editor's Award (2005) and R&D 100 award (2005). Continued research and engineering improvements in product design resulted in CADs with ever increasing capabilities. The newest iterations of the CAD are the Thermo Scientific Corona Veo Charged Aerosol Detector, Corona Veo RS Charged Aerosol Detector and Thermo Scientific Vanquish Charged Aerosol Detectors.
Monks whose bodies remain incorrupt without any traces of deliberate mummification are venerated by some Buddhists who believe they successfully were able to mortify their flesh to death. Self-mummification was practiced until the late 1800s in Japan and has been outlawed since the early 1900s. Many Mahayana Buddhist monks were reported to know their time of death and left their last testaments and their students accordingly buried them sitting in lotus position, put into a vessel with drying agents (such as wood, paper, or lime) and surrounded by bricks, to be exhumed later, usually after three years. The preserved bodies would then be decorated with paint and adorned with gold. Bodies purported to be those of self-mummified monks are exhibited in several Japanese shrines, and it has been claimed that the monks, prior to their death, stuck to a sparse diet made up of salt, nuts, seeds, roots, pine bark, and urushi tea.
Sources: en.wikipedia.org
It corresponds to the first 28 amino acids of thymosin beta-4, a larger protein found in many tissues. The fragment is acetylated at its N-terminus and is produced synthetically for research and pharmaceutical use. Synthetic and natural forms share the same sequence.
It is usually described as an immunomodulatory peptide rather than a classical hormone. It does not travel to a single distant organ in the manner of an endocrine hormone. Classification varies across sources, and some texts group it with thymic peptides generally.
The broad outline involves immune cell activation, but the specific molecular steps remain under investigation. Different studies report effects on dendritic cells, T cells, and natural killer cells. No single receptor has been confirmed as the sole mediator.
Aliquots are typically frozen well below zero Celsius and thawed only once, since repeated cycles promote aggregation and loss. Dilution into a neutral buffer limits degradation during short working periods, and prolonged storage at room temperature is avoided.