Everything below concerns Regulatory peptide. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-04-18. Numbers and descriptions here follow the published literature rather than marketing material.
Proposed mechanisms centre on modulation of the GABAergic system, with reports of altered expression of genes related to GABA-A receptor subunits and changed monoamine turnover. Some studies describe inhibition of enkephalinase, the enzyme that degrades endogenous enkephalins, which may prolong opioid peptide signalling. Effects on brain-derived neurotrophic factor and on cytokine expression have also been reported. These findings come largely from animal models and small human studies, and the precise primary target remains unresolved.
Published clinical evidence is limited. Most controlled trials were conducted in Russia, enrolled modest numbers of participants, and appeared in Russian-language journals, which restricts independent verification. Reported outcomes include lower anxiety scores, improved attention and memory measures, and changes in fatigue ratings. Reviews written in English note methodological limitations such as small samples and inconsistent endpoints. Whether the compound produces clinically meaningful benefit relative to established anxiolytics is therefore an open question rather than an established finding.
Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It was designed at the Institute of Molecular Genetics of the Russian Academy of Sciences as a structural analogue of tuftsin, a naturally occurring tetrapeptide fragment of the immunoglobulin heavy chain. The added Pro-Gly-Pro tail was intended to slow enzymatic degradation and extend biological activity. In Russia it is registered as an anxiolytic nasal preparation, while regulators elsewhere have not approved it for clinical use.
Reversed-phase high-performance liquid chromatography is the standard technique for estimating peptide purity. The result is a peak-area percentage, which describes how much of the detected material elutes as the main peak in one run. Mass spectrometry confirms the molecular mass and can reveal truncated, adducted, or otherwise modified species. Amino acid analysis or tandem mass spectrometry can address sequence fidelity when identity is in doubt. None of these measurements, taken alone, establishes that a sample is fit for any specific purpose.
Lyophilized selank is normally supplied as a dry powder and is considered stable for extended periods when kept cold and dry. Moisture uptake is the main practical threat, because absorbed water promotes both hydrolysis and aggregation in the solid state. Vials are usually warmed to room temperature before opening so that condensation does not form on the powder. Supplier documentation commonly specifies -20 °C for routine storage, with -80 °C used for material intended to be archived for years.
Once dissolved, the peptide is markedly less stable than the dry powder. Aqueous solutions are subject to backbone hydrolysis and to microbial growth when they are handled without sterile technique. Buffered solutions near neutral pH are common for short-term laboratory work, while acidic conditions are sometimes used to improve solubility. Analytical laboratories generally prepare working solutions fresh rather than storing them, and a residual water film left in a reopened vial can seed degradation even when the container appears dry.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C33H57N11O9 | Free peptide form |
| Molecular mass | About 751.9 Da | Calculated average mass |
| Amino acid sequence | Thr-Lys-Pro-Arg-Pro-Gly-Pro | Single-letter form TKPRPGP |
| Structural basis | Tuftsin analogue | Extended version of a natural tetrapeptide |
| Development origin | Russian Academy of Sciences | Work carried out from the 1980s onward |
Regulatory treatment varies by jurisdiction. In Russia the compound is a registered prescription product, while in the European Union and the United States it is generally handled as a research chemical without a marketing authorization. Suppliers therefore operate outside pharmaceutical oversight, and buyers rely on supplier documentation for purity and identity claims. Chain of custody and third-party testing are the main verification tools. Analysts note that the absence of a pharmacopoeial monograph for research-grade material limits standardization across vendors.
Purity assessment relies mainly on reverse-phase high-performance liquid chromatography with ultraviolet detection. Because the peptide lacks a strong chromophore, detection often uses backbone absorbance near 214 nm. Identity is confirmed by mass spectrometry, typically electrospray ionization or matrix-assisted laser desorption, comparing the measured mass against the expected value. Amino acid analysis can verify composition after acid hydrolysis. Diastereomer content and residual counterions are reported less often, although both can influence biological assays.
Animal studies have examined behaviour in tests of anxiety, memory retention and stress response, and several report changes in neurotrophic or neurotransmitter-related markers. The human evidence base is much smaller, consisting mainly of short trials conducted in Russia with limited reporting in English-language journals. Sample sizes are modest and outcome measures vary between studies, so the findings are best described as preliminary. Independent replication under modern trial standards has not been widely reported.
Outside its country of origin the compound is generally handled as a research chemical rather than an approved medicine. No regulatory approval from the United States Food and Drug Administration or the European Medicines Agency has been granted for human use. Identity and purity are normally checked by reverse-phase high-performance liquid chromatography, with mass spectrometry used to confirm the molecular mass. Lyophilised material is stored cold and desiccated, and repeated freeze-thaw cycles are avoided.
Published work on this peptide almost always uses intranasal delivery, with drops or a spray applied to the nasal mucosa. Some animal experiments have used subcutaneous or intraperitoneal injection, and a smaller number have compared routes directly. Oral administration is not a focus of the literature, because short peptides of this size are broken down by digestive enzymes and cross intestinal barriers poorly. How much of an intranasal dose reaches the bloodstream intact in humans remains an open question.
Selank is a hydrophilic peptide and dissolves readily in water and in aqueous buffers. The lyophilised powder is typically a white to off-white solid. Because short peptides are prone to hydrolysis and oxidation, handling benefits from limiting exposure to heat, moisture and strong light. Working solutions are commonly prepared in sterile water or saline, and repeated freeze-thaw cycles are avoided to reduce aggregation and loss of activity. These practices reflect general laboratory convention rather than published stability specifications.
Dry powder is normally held at -20 degrees Celsius or lower, in a sealed container with desiccant and protection from light. Reconstituted solutions are usually kept at 2 to 8 degrees Celsius for short periods and frozen for longer ones. Proline residues at several positions are generally associated with some resistance to peptidase attack, but chemical stability still declines at neutral to alkaline pH and at elevated temperature. Exact shelf-life figures are product-specific and are not standardised across suppliers.
=== Post-Reynolds era and the "Slugging Seventies" (1961–1980) === John Coleman started his coaching career at Essendon in 1961, thus ending the Dick Reynolds era at the club. In the same year, Essendon finished the season mid-table, and supporters were not expecting too much for the following season. However, the club blitzed the opposition in 1962, losing only two matches and finishing top of the table. Both losses were to the previous year's grand finalists. The finals posed no problems for the resurgent Dons, easily accounting for Carlton in the season's climax, winning the 1962 Premiership by 32 points. This was a remarkable result for Coleman, who, in just his second season of coaching, claimed the ultimate prize in Australian football. As so often is the case after a flag, the following two years were below standard. A further premiership in 1965 (won from 4th position on the ladder) was also unexpected due to periods of poor form during the 1965 season. The Bombers were a different club when the finals came around, but some of the credit for the improvement was given to the influence of Brian Sampson and Ted Fordham during the finals. Coleman's time as coach turned out to be much like his playing career: highly successful but cut short when he had to stand down due to health problems in 1967. Only six years later, on the eve of the 1973 season, he died of a heart attack at just 44 years of age. Following Coleman's retirement, the club experienced tough times on and off the field.
== Legacy == A Review of General Psychology survey, published in 2002, ranked Jung as the 23rd most cited psychologist of the 20th century. The list however focused on U.S. journals and was made by the psychology department of Arkansas State University. Although psychoanalysis is still studied in the humanities, a 2008 study in The Journal of the American Psychoanalytic Association found that psychology departments and textbooks treat it as "desiccated and dead". Similarly, Alan Stone noted, "As academic psychology becomes more 'scientific' and psychiatry more biological, psychoanalysis is being brushed aside."
Kimchi is made of various vegetables and contains a high concentration of dietary fiber, while being low in food energy. The vegetables used in kimchi also contribute to intake of vitamin A, thiamine (B1), riboflavin (B2), calcium, and iron.
By the terms of the 1945 Potsdam Agreement signed by the three victorious Great Powers, the Soviet Union retained most of the territories captured as a result of the Molotov–Ribbentrop Pact of 1939, including western Ukraine and western Belarus, and gained others. Lithuania and the Königsberg area of East Prussia were officially incorporated into the Soviet Union, in the case of the former without the recognition of the Western powers. Poland was compensated with the bulk of Silesia, including Breslau (Wrocław) and Grünberg (Zielona Góra), the bulk of Pomerania, including Stettin (Szczecin), and the greater southern portion of the former East Prussia, along with Danzig (Gdańsk), pending a final peace conference with Germany which eventually never took place. Collectively referred to by the Polish authorities as the "Recovered Territories", they were included in the reconstituted Polish state. With Germany's defeat Poland was thus shifted west in relation to its prewar location, to the area between the Oder–Neisse and Curzon lines, which resulted in a country more compact and with much broader access to the sea.[c] The Poles lost 70% of their pre-war oil capacity to the Soviets, but gained from the Germans a highly developed industrial base and infrastructure that made a diversified industrial economy possible for the first time in Polish history. The flight and expulsion of Germans from what was eastern Germany prior to the war began before and during the Soviet conquest of those regions from the Nazis, and the process continued in the years immediately after the war.
=== United States === Similar to the law of Canada, the U.S. law (27 CFR 5.148) says that tequila must be "made in Mexico, in compliance with the laws and regulations of Mexico governing the manufacture of Tequila for consumption in that country."
Sources: en.wikipedia.org
=== Australia === Dialysis is provided without cost to all patients through Medicare, with 75% of all dialysis being administered as haemodialysis to patients three times per week in a dialysis facility. The Northern Territory has the highest incidence rate per population of haemodialysis, with Indigenous Australians having higher rates of Chronic Kidney Disease and lower rates of functional kidney transplants than the broader population. The remote Central Australian town of Alice Springs, despite having a population of approximately 25000, has the largest dialysis unit in the Southern Hemisphere. Many people must move to Alice Springs from remote Indigenous communities to access health services such as haemodialysis, which results in housing shortages, overcrowding, and poor living conditions.
== Awards == Borden Award (American Chemical Society) 1957 Bond Award (American Oil Chemists’ Society) 1973 Agricultural and Food Chemistry Award (American Chemical Society) 1973 Senior Scientist Award (Alexander von Humboldt Foundation) 1981 Macy-Gyorgy Award for Research in Human Milk and Lactation 1997 Penn State Alumni Fellow Award 2001 Penn State Distinguished Alumnus Award 2002
The total weight of the breast tissues removed was 44.8 kilograms (99 lb). Another extreme case was observed in 2008 in Maria Vittoria Hospital in Turin, Italy, where the amount removed from both breasts was 17.2 kg (38 lb). The growth occurred during puberty making it a case of juvenile gigantomastia, but the patient did not seek treatment until the age of 29. Another extreme case was observed on August 28, 2003, when a 24-year-old woman was admitted to the Clinical Center Skopje in North Macedonia with gigantomastia of pregnancy and the amount later removed from both breasts was 15 kg (33 lb) in total. A second case in North Macedonia was reported when the breasts of a 30-year-old woman from a remote mountain village in eastern North Macedonia suddenly grew to more than 30 kilograms (66 lb) total. As the disorder becomes more widely known, media reports have increased. French Canadian Isabelle Lanthier appeared on Montel Williams' talk show where she told how her chest grew from 86 cm (34 in) to 133 cm (52 in) in five months during her pregnancy. At their largest, one breast weighed 6.8 kg (15 lb) and the other 5.4 kg (12 lb). Her husband custom-made a special bra to support her breasts. In 2007, a Chilean TV station covered the story of 32-year-old Yasna Galleguillos from Antofagasta, who experienced ongoing back pain, making everyday tasks very difficult to perform. She underwent breast reduction surgery to relieve her pain. Surgeons removed 4.25 kilograms (9.4 lb) from one breast and 3.33 kilograms (7.3 lb) from the other breast.
The coexistence of intense, divergent moods within an individual was recognized by Homer, Hippocrates, and Aretaeus, the last describing the vacillating presence of impulsive anger, melancholia, and mania within a single person. Swiss physician Théophile Bonet revived the concept in 1684, and used the term folie maniaco-mélancolique to describe the phenomenon of unstable moods that followed an unpredictable course. Other writers noted the same pattern, including the American psychiatrist Charles H. Hughes in 1884 and J. C. Rosse in 1890, who called the disorder "borderline insanity". In 1921, Emil Kraepelin identified an "excitable personality" that closely parallels the borderline features outlined in the current concept of BPD. The idea that there were forms of disorder that were neither psychotic nor simply neurotic began to be discussed in psychoanalytic circles in the 1930s. The first formal definition of borderline disorder is widely acknowledged to have been written by Adolph Stern in 1938. He described a group of patients who he felt to be on the borderline between neurosis and psychosis, who often came from family backgrounds marked by trauma. He argued that such patients would often need more active support than that provided by classical psychoanalytic techniques. The 1960s and 1970s saw a shift from thinking of the condition as borderline schizophrenia to thinking of it as a borderline affective disorder (mood disorder), on the fringes of bipolar disorder, cyclothymia, and dysthymia.
== Manufacturing == Industrial production of cottage cheese relies on two primary methodologies: the traditional cultured method and the direct acid-set method. The global adoption of these processes varies by region due to local clean-label food regulations, factory scales, and consumer flavour preferences. Both processes begin with pasteurised skimmed milk, concentrated non-fat milk, or reconstituted non-fat dry milk to control baseline protein ratios.
Sources: en.wikipedia.org
== Biosynthesis == Both ginger (Zingiber officinale) and turmeric (Curcuma longa) had been suspected to utilize phenylpropanoid pathway and produce putative type III polyketide synthase products based on the research of 6-gingerol biosynthesis by Denniff and Whiting in 1976 and by Schröder's research in 1997. 6-Gingerol is the major gingerol in ginger rhizomes and it possesses some interesting pharmacological activities like analgesic effect. While the biosynthesis of 6-gingerol is not fully elucidated, plausible pathways are presented here.
=== Geometry === The majority of β-strands are arranged adjacent to other strands and form an extensive hydrogen bond network with their neighbors in which the N−H groups in the backbone of one strand establish hydrogen bonds with the C=O groups in the backbone of the adjacent strands. In the fully extended β-strand, successive side chains point straight up and straight down in an alternating pattern. Adjacent β-strands in a β-sheet are aligned so that their Cα atoms are adjacent and their side chains point in the same direction. The "pleated" appearance of β-strands arises from tetrahedral chemical bonding at the Cα atom; for example, if a side chain points straight up, then the bonds to the C′ must point slightly downwards, since its bond angle is approximately 109.5°. The pleating causes the distance between Cαi and Cαi + 2 to be approximately 6 Å (0.60 nm), rather than the 7.6 Å (0.76 nm) expected from two fully extended trans peptides. The "sideways" distance between adjacent Cα atoms in hydrogen-bonded β-strands is roughly 5 Å (0.50 nm).
North Korea's human rights record is often considered to be the worst in the world and has been globally condemned, with the United Nations, the European Union and groups such as Human Rights Watch all critical of the country's record. Furthermore, North Korea has the highest estimated prevalence of modern slavery in the world. . As of 2021, a Global Slavery Index 2023 report estimates that about one-in-ten people live in modern slavery conditions. Forms of torture, forced labour, and abuses are all widespread. Most international human rights organizations consider North Korea to have no contemporary parallel with respect to violations of liberty.
=== Red peppercorns === Red peppercorns usually consist of ripe peppercorn drupes preserved in brine and vinegar. Ripe red peppercorns can also be dried using the same colour-preserving techniques used to produce green pepper.
Sources: en.wikipedia.org
It is a seven-amino-acid peptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro, produced by chemical synthesis rather than extracted from biological tissue. Its design is based on tuftsin, a natural immunomodulatory tetrapeptide. The C-terminal Pro-Gly-Pro segment is a common stabilising motif in short regulatory peptides.
The core four residues correspond to tuftsin, which occurs naturally as part of immunoglobulin G. The full seven-residue sequence, however, is not a known endogenous peptide. It is a laboratory-designed analogue intended to combine tuftsin-like activity with greater resistance to breakdown.
No single receptor has been confirmed as the primary target. Reports describe involvement of the GABAergic system, interference with enkephalin degradation, and shifts in neurotrophic factor expression. Because these observations come from different models and assays, they have not yet been integrated into one accepted mechanism.
Sealed, desiccated storage at -20 °C or colder is the standard recommendation for research-grade material. Vials should reach room temperature before they are opened, which limits condensation. Repeated temperature cycling is discouraged.