If you have been reading about proteolysis 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 2026-05-07. Numbers and descriptions here follow the published literature rather than marketing material.
Clinical evidence comes mainly from small studies conducted in Russia, several of which were open-label or lacked robust blinding. Reported outcomes include lower anxiety scores, changes in attention measures, and effects on asthenic states following illness. Sample sizes are typically in the tens of participants, and independent replication outside the region is scarce. Reviews published in English generally note the limited methodological quality of the underlying trials. Whether the compound produces clinically meaningful effects under rigorous conditions remains unresolved.
Proposed mechanisms center on modulation of the GABA system, but no single molecular target has been confirmed. Rodent studies report changes in GABA-A receptor expression and in the turnover of serotonin, dopamine, and norepinephrine in several brain regions. Increases in brain-derived neurotrophic factor and its receptor have also been described after repeated administration. These findings come largely from animal models, and the degree to which they describe human neurochemistry remains an open question. The mechanism is best characterized as multi-system and not fully resolved.
Reverse-phase high-performance liquid chromatography with ultraviolet detection near 214 nanometres is the standard purity method. Mass spectrometry, typically electrospray ionisation, confirms identity through the expected mass-to-charge pattern. Amino acid analysis can verify composition independently. Chiral purity requires separate techniques such as derivatisation followed by chromatographic separation, and such data are rarely reported for research-grade material.
Quantification in biological matrices relies on liquid chromatography coupled to tandem mass spectrometry with stable-isotope internal standards. Low plasma concentrations and adsorption to container surfaces both complicate measurement. Solid-phase extraction is often needed to reduce matrix interference before injection. Reported limits of quantification differ widely between laboratories, which makes direct comparison of pharmacokinetic results difficult and limits meta-analysis.
| Property | Value | Notes |
|---|---|---|
| Route studied | Intranasal | Predominant route in published reports |
| Circulation stability | Short, minutes scale | Peptidases cleave it; the tail slows the process |
| Analytical method | RP-HPLC with mass spectrometry | Used for identity and purity assessment |
| Reported outcome domains | Anxiety and cognitive measures | Derived from small, mostly regional trials |
| Regulatory status | Marketed in Russia | Availability outside that market is limited |
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.
Selank is not a naturally occurring peptide and has no known endogenous counterpart in human physiology. Russian-language sources frequently call it TP-7, while English-language sources use the name Selank almost exclusively. Database indexing is uneven, partly because early reports appeared in regional journals that are not widely cataloged. Some summaries describe the material as a tuftsin analog and others as a synthetic heptapeptide; the labels overlap rather than conflict. Citing the primary sequence resolves ambiguity more reliably than the research or trade name alone.
Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro, written TKPRPGP in one-letter notation. Its structure consists of the immunomodulatory tetrapeptide tuftsin, Thr-Lys-Pro-Arg, extended at the carboxyl terminus by a Pro-Gly-Pro segment. The molecular formula is commonly given as C33H57N11O9, corresponding to a monoisotopic mass near 751.4 Da and an average molecular mass near 751.9 Da. All seven residues are proteinogenic amino acids, and the molecule carries no modified side chains or non-natural linkages.
Solubility behavior is a practical concern for handling. Selank dissolves readily in water and in common aqueous buffers, which simplifies preparation of working solutions. The choice of solvent, ionic strength, and pH can influence aggregation over time, particularly at higher concentrations. Aqueous solutions are typically sterile-filtered before use. Because stability depends on several variables, storage and handling notes should be treated as general guidance rather than fixed rules, and specific values are best confirmed against a certificate of analysis for each batch.
Characterization of Selank in a laboratory setting relies on standard peptide methods. Reverse-phase high-performance liquid chromatography separates the target from related impurities and provides a purity figure, commonly reported as 95 percent or higher. Mass spectrometry, typically electrospray ionization or matrix-assisted laser desorption, confirms the molecular mass and helps detect truncation or modification. Amino acid analysis can verify composition when a sequence-level check is needed. These techniques together establish identity and purity for a given lot.
Lyophilized Selank, the dry powder form, is generally stored frozen at minus 20 degrees Celsius or colder for long-term keeping. The solid is hygroscopic and should stay sealed, dry, and protected from light. Once dissolved, the peptide is less stable and is usually held refrigerated at 2 to 8 degrees Celsius for short periods. Repeated freezing and thawing is avoided because it can promote aggregation and loss of activity. Buffers and pH choice also affect how long a solution remains usable.
Reported pharmacological effects center on reduced anxiety-like behavior in animal models and on measures of memory and learning. Proposed contributing mechanisms include modulation of GABAergic signaling, shifts in monoamine turnover, and changes in the activity of enzymes that degrade neuropeptides. Effects on the expression of genes linked to neuroplasticity have also been described. No single molecular target is widely accepted, and whether the behavioral findings arise from one pathway or several remains an open question.
Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It was designed as a stabilized analogue of tuftsin, a naturally occurring tetrapeptide fragment derived from the immunoglobulin heavy chain. The additional Pro-Gly-Pro segment at the carboxyl terminus is intended to slow enzymatic cleavage. The compound is usually described in the literature as a synthetic peptide with anxiolytic and cognitive-related activity, a label that reflects a research context rather than an approved therapeutic category.
Most published work on selank originates from a small number of research groups in the Russian Federation. A large share of that record appears in Russian-language journals, which limits access for readers who rely on English-indexed databases. Independent replication by laboratories outside the original research network is sparse in publicly available sources. This concentration of origin and language is a frequently noted feature when the compound is summarized in broader reviews of synthetic peptides.
Paper chromatography is an analytical method used to separate colored chemicals or substances. It can also be used for colorless chemicals that can be located by a stain or other visualisation method after separation. It is now primarily used as a teaching tool, having been replaced in the laboratory by other chromatography methods such as thin-layer chromatography (TLC). This analytic method has three components, a mobile phase, stationary phase and a support medium (the paper). The mobile phase is generally a non-polar organic solvent in which the sample is dissolved. The stationary phase consists of (polar) water molecules that were incorporated into the paper when it was manufactured. The mobile phase travels up the stationary phase by capillary action, carrying the sample with it. The difference between TLC and paper chromatography is that the stationary phase in TLC is a layer of adsorbent (usually silica gel, or aluminium oxide), and the stationary phase in paper chromatography is less absorbent paper. A paper chromatography variant, two-dimensional chromatography, involves using two solvents and rotating the paper 90° in between. This is useful for separating complex mixtures of compounds having similar polarity, for example, amino acids.
Bobby Flay's Bold American Food (Warner Books, May 31, 1994) – ISBN 978-0-4465-1724-9 Bobby Flay's From My Kitchen to Your Table (Clarkson Potter, March 31, 1998) – ISBN 978-0-517-70729-6 Bobby Flay's Boy Meets Grill (Hyperion, May 19, 1999) – ISBN 978-0-7868-6490-4 Bobby Flay Cooks American (Hyperion, September 30, 2001) – ISBN 978-0-7868-6714-1 Bobby Flay's Boy Gets Grill (Scribner, May 18, 2004) – ISBN 978-0-7432-5481-6 Bobby Flay's Grilling For Life (Scribner, May 3, 2005) – ISBN 978-0-7432-7272-8 Bobby Flay's Mesa Grill Cookbook (Clarkson Potter, October 16, 2007) – ISBN 978-0-3073-5141-8 Bobby Flay's Grill It! (Clarkson Potter, April 18, 2008) – ISBN 978-0-3073-5142-5 Bobby Flay's Burgers, Fries and Shakes (Clarkson Potter, April 11, 2009) – ISBN 978-0-3074-6063-9 Bobby Flay's Bar Americain Cookbook: Celebrate America's Great Flavors (Clarkson Potter, September 20, 2011) – ISBN 978-0-307-46138-4 Bobby Flay's Throwdown (Clarkson Potter, October 12, 2012) – ISBN 978-0-3077-1916-4 Bobby Flay's Barbecue Addiction (Clarkson Potter, April 23, 2013) – ISBN 978-0-3074-6139-1 Bobby Flay Fit: 200 Recipes for a Healthy Lifestyle (Co-authors: Stephanie Banyas and Sally Jackson; Publisher – Clarkson Potter, December 5, 2017) - ISBN 978-0-3853-4593-4 Bobby at Home: Fearless Flavors from My Kitchen (Clarkson Potter, September 24, 2019) – ISBN 978-0-3853-4591-0
In April 2025, Eli Lilly, represented by Kirkland & Ellis and Walsh Pizzi O'Reilly Falanga, filed a series of lawsuits in federal courts in New Jersey and California against several telehealth and compounding pharmacy companies, including Willow Health Services, Henry Meds, Mochi Health, Fella Health, and Empower Clinic Services, alleging unfair competition, false advertising, and deceptive business practices related to the sale of unapproved compounded tirzepatide products marketed for weight loss. The company argued that the defendants sold compounded versions of tirzepatide without FDA approval or adequate testing and falsely claimed that their products were safe, effective, and superior to Lilly's FDA-approved drugs Mounjaro and Zepbound. The defendants disputed the claims, characterising the lawsuits as an attempt by Eli Lilly to restrict competition and limit patient and provider choice in the weight-loss drug market. In August 2025, U.S. District Judge Karen Marston issued the first substantive rulings in that multidistrict litigation, dismissing several claims while allowing the core allegations to proceed. The court rejected portions of the plaintiffs' misrepresentation, medical monitoring, and design defect claims, but allowed claims alleging that Novo Nordisk and Eli Lilly failed to adequately warn patients about gastrointestinal risks on drug labels to move forward. The litigation at that stage encompassed more than 2,600 individual lawsuits involving Ozempic, Mounjaro, and related GLP-1 receptor agonist drugs.
=== Development suspended === EQ-101 (BNZ132) – intravenous – alopecia areata – interleukin 15 receptor antagonist, interleukin 2 receptor antagonist, interleukin 9 receptor antagonist Research programme: SNA based alopecia therapeutics - Exicure/AbbVie – alopecia – gene expression modulators XCUR-17 – topical – alopecia – RNA interference
Sources: en.wikipedia.org
=== Malay === Malay, just like Indonesian, is an agglutinative language (at least in the formal language) and it belongs to the Austronesian language family. The longest word in Malay is mempertanggungjawabkan, which is 22 letters long, meaning "to give responsibility to" in English.
Therefore, Danes were sent to Kiel for their education instead of Copenhagen, where they received their education in German rather than their native Danish. As a result, Danish students, future administrators, clergy, and educators were taught in German and continued to use the language throughout their professional lives. In 1814, mandatory schooling was instituted, and it was taught in German. This created generations of Danish children who learned German from an early age. Their schooling was conducted in German, they heard Sermons in German, and when they grew up, their interactions with the administration and business were conducted in German. Additionally, if Danes didn't learn German, they couldn't communicate with the administration, which often cared little if the citizens were able to understand them. Therefore, if the Danes weren't able to speak German, they were effectively frozen out of any official matters. As a result, a language shift slowly began forming in South Schleswig and gradually spread north, which alarmed Copenhagen. The Danish authorities started taking countermeasures to halt the language shift by banning German in all official matters in Schleswig, which only served to create tensions between Danes and Germans. This language strife significantly contributed to shaping the inhabitants' national sentiments during a time of national unrest in Europe. It is also during this period that we see surname changes, such as from Jørgensen to Jürgensen or Nielsen to Nilsen, in South Schleswig.
== History == The first O' Coffee Club outlet opened in Holland Village, Singapore in 1991. During its founding, it was Singapore's first gourmet coffee house and the company had their own roasting facilities located in the first outlet. The chain has expanded locally and regionally since then and currently has outlets in Malaysia and Indonesia. Central production facilities were established since its expansion to ensure product quality.
All surface ships, as well as surfaced submarines, are in a positively buoyant condition, weighing less than the volume of water they would displace if fully submerged. To submerge hydrostatically, a ship must have negative buoyancy, either by increasing its own weight or decreasing its displacement of water. To control their displacement and weight, submarines have ballast tanks, which can hold varying amounts of water and air. For general submersion or surfacing, submarines use the main ballast tanks (MBTs), which are ambient pressure tanks, filled with water to submerge or with air to surface. While submerged, MBTs generally remain flooded, which simplifies their design, and on many submarines, these tanks are a section of the space between the light hull and the pressure hull. For more precise control of depth, submarines use smaller depth control tanks (DCTs)—also called hard tanks (due to their ability to withstand higher pressure) or trim tanks. These are variable buoyancy pressure vessels, a type of buoyancy control device. The amount of water in depth control tanks can be adjusted to hydrostatically change depth or to maintain a constant depth as outside conditions (mainly water density) change. Depth control tanks may be located either near the submarine's center of gravity, to minimise the effect on trim, or separated along the length of the hull so they can also be used to adjust static trim by transfer of water between them.
Thirty radioisotopes of protactinium have been discovered, ranging from 210Pa to 239Pa. The most stable are 231Pa with a half-life of 32,650 years, 233Pa with a half-life of 26.975 days, and 230Pa with a half-life of 17.4 days. All other isotopes have half-lives shorter than 1.6 days, and the majority of these have half-lives less than 1.8 seconds. Protactinium also has six nuclear isomers, with the most stable being 234mPa (half-life 1.159 minutes). The primary decay mode for the most stable isotope 231Pa and lighter isotopes (210Pa to 227Pa) is alpha decay, producing isotopes of actinium. The primary decay mode for 228Pa to 230Pa is electron capture or beta plus decay, producing isotopes of thorium, while the primary decay mode for the heavier isotopes (232Pa to 239Pa) is beta decay, producing isotopes of uranium.
Sources: en.wikipedia.org
Reports describe effects on GABA-A receptor expression, monoamine turnover, and neurotrophic factor levels. These are proposed mechanisms drawn mainly from animal models. No single molecular target has been established.
Intranasal delivery is the route described in most published work. It is used because the peptide is degraded quickly once it reaches circulation. Direct evidence of brain penetration in humans is lacking.
Most trials are small, regionally concentrated, and often lack rigorous blinding or placebo control. Independent replication is limited. Reviews in English generally rate the evidence as preliminary.
Dry powder is best kept sealed, protected from light, and held at minus 20 degrees Celsius or below. Desiccant packaging helps limit moisture uptake because the material is hygroscopic. A sealed vial should be allowed to equilibrate to room temperature before opening to reduce condensation.