lyophilized powder is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-01-24. Where a claim depends on a specific study, the study is described rather than over-claimed.
The compound is registered in Russia as a pharmaceutical product, most commonly formulated as a nasal solution, and has been used in that setting since the 1990s. Outside that jurisdiction it is generally handled as a research chemical rather than an approved medicine. Regulatory status therefore differs sharply between countries, and material sold internationally may not correspond to the Russian pharmaceutical formulation. Documentation with commercial samples is typically limited to a certificate of analysis covering purity and identity, not clinical status or local legal classification.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. It corresponds to the ACTH(4-7) fragment extended at the C-terminus by a Pro-Gly-Pro tripeptide, an addition intended to slow enzymatic breakdown. The molecular formula is C37H51N9O10S and the molecular mass is approximately 814 daltons. In the literature it is often described as an ACTH(4-10) analog, although that label reflects a naming convention as much as a precise structural relationship. The compound was developed in Russia and remains most closely associated with that research tradition.
The compound was developed during the 1980s at the Institute of Molecular Genetics in Moscow as part of research on fragments of adrenocorticotropic hormone. Early work examined short ACTH-derived sequences that retained neurotrophic effects while lacking the endocrine activity of the full hormone. Semax entered clinical use in Russia during the 1990s, where it received registration for several neurological indications. Outside that region it remained primarily a laboratory research material rather than an approved therapeutic. English-language literature on it grew more slowly and frequently cited the original Russian studies.
Terminology around the compound varies by source. It appears in catalogues and papers as Semax, as the heptapeptide ACTH(4-7)-Pro-Gly-Pro, and under various alphanumeric laboratory codes used by individual suppliers. These names refer to the same sequence but may imply different salt forms, purity grades, or counter-ions. Peptide databases usually list the free base mass, while product descriptions sometimes report acetate or trifluoroacetate salts with a different formula weight. Because naming conventions for research peptides are not standardised across vendors, checking the declared sequence and measured mass is more reliable than relying on a trade name alone.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C37H51N9O10S | Contains one methionine sulfur atom |
| Molecular mass | Approximately 814 Da | Consistent with a seven-residue peptide |
| Appearance | White to off-white powder | Typical lyophilized form |
| Solubility | Freely soluble in water | Also soluble in dimethyl sulfoxide |
| Typical storage | -20 °C, desiccated | Limits methionine oxidation |
The bone marrow stroma contains mesenchymal stem cells (MSCs), which are also known as marrow stromal cells. These are multipotent stem cells that can differentiate into a variety of cell types. MSCs have been shown to differentiate, in vitro or in vivo, into osteoblasts, chondrocytes, myocytes, marrow adipocytes and beta-pancreatic islets cells.
== Pharmaceutical use == As a synthetic drug, synephrine first appeared in Europe in the late 1920s, under the name of Sympatol. One of the earliest papers describing its pharmacological and toxicological properties was written by Lasch, who obtained it from the Viennese company Syngala. By 1930, Sympatol was referred to as a Boehringer product, while one of the first US Patents describing its preparation and use was assigned to Frederick Stearns & Co. in 1933. Despite the date of this patent, clinical and pharmacological research on synephrine obtained from Frederick Stearns & Co was being carried out in the US by 1930. Writing in 1931, Hartung reported that in 1930 the Council on Pharmacy and Chemistry of the American Medical Association had accepted synephrine for inclusion in its list of "New and Non-Official Remedies" as an agent for the treatment, by either oral or parenteral administration, "of attacks of hay fever, asthma, coughing, spasms of asthma and pertussis (whooping cough)." However, synephrine was dropped from the council's list in 1934, and its apparent re-advertising as a new drug by the Stearns company ten years later elicited a scathing comment from the Editors of the Journal of the American Medical Association. The third edition (1965) of Drill's Pharmacology in Medicine stated, with reservations, that synephrine was "advertised as an antihistaminic to be used in the treatment of the common cold...", under the trade name of "Synephrin Tartrate", and indicated that the dose was 100 mg, given intramuscularly, or subcutaneously.
The Cuban activist and historian Emilio Roig de Leuchsenring wrote of Freemasonry in Cuba:"To fully express what Freemasonry represents for us in a few words, suffice to say that, without mentioning it once, twice and perhaps a thousand times, one cannot write the history of Cuban culture or Cuba's struggle for freedom."
== Research == There are various studies researching the concept of the wounded healer, most notably that by British counselor and psychotherapist Alison Barr who studied the significance of psychological wounds on people who decide to train as counsellors or psychotherapists. Barr used a pluralistic approach to her research, with the quantitative data analyzed using descriptive and inferential statistics and the qualitative data analyzed using thematic analysis, with a grounded theory approach. An on-line questionnaire was conducted with 253 respondents. Pilot and verification studies were performed, and opportunities for further research highlighted. Barr’s results showed that 73.9% of counselors and psychotherapists have experienced one or more wounding experiences leading to career choice. She also noted the following:
Sources: en.wikipedia.org
== Scarcity == Sea cucumbers in the waters of Malaysia have been over-harvested to supply consumers of the folk remedy, and as a result the animal and its products are becoming scarce. Efforts to restock the fishery have not generally been successful. Recently, a sea cucumber aquaculture operation was opened on the shores of several Malaysian islands to increase the gamat supply.
== Locations == The company opened its first location on August 26, 2002, near the intersection of 21st Street and Tyler Road in Wichita; this location is still in operation. In November 2022, it was announced that Freddy's would be expanding to nine provinces in Canada, with the first location set for a 2025 opening. As of September 10, 2025, Freddy's had 560 locations across 37 states. Additionally, the chain opened in non-traditional locations such as OKC Will Rogers International Airport in Oklahoma City and Busch Stadium in St. Louis.
=== Protein transport === Secretory proteins, mostly glycoproteins, are moved across the endoplasmic reticulum membrane. Proteins that are transported by the endoplasmic reticulum throughout the cell are marked with an address tag called a signal sequence. The N-terminus (one end) of a polypeptide chain (i.e., a protein) contains a few amino acids that work as an address tag, which are removed when the polypeptide reaches its destination. Nascent peptides reach the ER via the translocon, a membrane-embedded multiprotein complex. Proteins that are destined for places outside the endoplasmic reticulum are packed into transport vesicles and moved along the cytoskeleton toward their destination. In human fibroblasts, the ER is always co-distributed with microtubules and the depolymerisation of the latter cause its co-aggregation with mitochondria, which are also associated with the ER. The endoplasmic reticulum is also part of a protein sorting pathway. It is, in essence, the transportation system of the eukaryotic cell. The majority of its resident proteins are retained within it through a retention motif. This motif is composed of four amino acids at the end of the protein sequence. The most common retention sequences are KDEL for lumen-located proteins and KKXX for transmembrane proteins. However, variations of KDEL and KKXX do occur, and other sequences can also give rise to endoplasmic reticulum retention. It is not known whether such variation can lead to sub-ER localizations.
Since radon is a colorless, odorless gas, the only way to know how much is present in the air or water is to perform tests. In the US, radon test kits are available to the public at retail stores, such as hardware stores, for home use, and testing is available through licensed professionals, who are often home inspectors. Efforts to reduce indoor radon levels are called radon mitigation. In the US, the EPA recommends all houses be tested for radon. In the UK, under the Housing Health & Safety Rating System, property owners have an obligation to evaluate potential risks and hazards to health and safety in a residential property. Alpha-radiation monitoring over the long term is a method of testing for radon that is more common in countries outside the United States.
== Positive feedback loops == For many intracrines, once they stimulate the upregulation of a gene, a positive feedback loop is initiated. The intracrine promotes cell proliferation and stimulates further intracellular signaling, leading to increased synthesis and release of the intracrine itself, thereby reinforcing the loop. In multicellular organisms, an intracrine may also be secreted, causing neighboring cells to proliferate and enter a similar positive feedback loop. This mechanism results in a coordinated response that contributes to tissue growth and development.
Sources: en.wikipedia.org
It is registered as a pharmaceutical product in Russia, where it is typically supplied as a nasal solution. In most other countries it is not an approved drug and is traded as a research chemical instead. Approval status depends entirely on the jurisdiction involved.
Most published work uses intranasal administration, matching the route of the registered Russian formulation. Some animal experiments use intravenous or intraperitoneal injection. The route matters because the intact peptide is cleared rapidly from blood, so exposure differs between methods.
A purity value describes the share of the powder accounted for by the target peptide, usually by high-performance liquid chromatography. It does not confirm that the sequence is correct, which requires mass spectrometry or amino acid analysis. Purity and identity are separate checks.
It is a synthetic seven-amino-acid peptide built from the ACTH(4-7) sequence plus a Pro-Gly-Pro tail. It belongs to the family of short ACTH fragments studied for nervous-system effects. Its backbone contains only standard amino acids.