The short version of Mass spectrometry fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-03-04 and is reviewed periodically as new material appears.
BPC-157 is a synthetic peptide of fifteen amino acids, written in single-letter code as GEPPPGKPADDAGLV. The sequence corresponds to a partial fragment of a protein isolated from human gastric juice, described in early reports as body protection compound. The number 157 refers to a fragment designation in that work rather than to molecular mass. Initial descriptions appeared in the early 1990s, when the fragment was reported to protect gastrointestinal tissue in animal models. Commercial material is produced by solid-phase peptide synthesis rather than extracted from biological sources.
Laboratory research on this peptide has examined a wide and heterogeneous set of endpoints, including gastric ulcer models, tendon and ligament injury, wound closure, and intestinal inflammation. Most published findings come from rodent studies, and reported effect sizes are often large relative to controls. Because the compound has been tested across many unrelated injury models, the literature is frequently described as unusually broad for a single peptide. A substantial share of this work originates from a small number of research groups, which matters when assessing how widely results have been reproduced.
Published studies on BPC-157 are dominated by animal models. Commonly used endpoints include healing of surgically induced lesions in the stomach, tendon-to-bone attachment after transection, and recovery from experimentally induced vascular or intestinal damage. Many of these reports come from a small number of research groups, and the peptide is often described as acting across a wide range of tissue types. That breadth is itself a point of discussion, since one molecule influencing many unrelated systems is unusual.
Human data are far more limited than animal data. A small number of clinical reports exist, generally with few participants and without the randomization or blinding expected in later-phase trials. No large, independently replicated human trial has appeared in the indexed peer-reviewed literature. Statements about effects in people therefore rest on extrapolation from animal work rather than on direct evidence, and the strength of that extrapolation remains an open question rather than a settled matter.
Proposed mechanisms include interaction with the nitric oxide system, modulation of growth factor signaling, and effects on blood vessel formation. None of these has been established as the primary mode of action, and some proposed pathways rest on indirect measurements. Whether the reported effects depend on a specific receptor has not been determined. Stability in gastric acid, unusual for a peptide of this size, is also reported in animal work, but the reason for it is not firmly established.
| Property | Value | Notes |
|---|---|---|
| Class | Synthetic peptide | Linear, fifteen residues |
| Sequence | GEPPPGKPADDAGLV | Single-letter amino acid code |
| Approximate mass | 1419 Da | Value reported for the free peptide |
| Reported origin | Fragment of a gastric juice protein | Used as the design template |
| Common synonyms | Body protection compound 157; PL 14736 | Naming varies across papers and suppliers |
BPC-157 is a synthetic fifteen-amino-acid peptide whose sequence is GEPPPGKPADDAGLV. Its name derives from the phrase body protection compound, a term applied to a protein fraction originally detected in human gastric juice. The short peptide is not that full protein; it corresponds to a stable fragment of the larger molecule. Researchers frequently describe it as a pentadecapeptide because it contains exactly fifteen residues. Its neutral molecular mass is approximately 1419 daltons.
The sequence places several glycine and proline residues near the middle, which may influence how the chain folds in solution. The peptide is linear rather than cyclic, and it carries no disulfide bridges. Commercial material is commonly supplied as the acetate salt, although the free base and other counterion forms also appear. Because the term BPC-157 refers to a specific sequence, samples with slight sequence variants are chemically different substances. Published work generally treats the fifteen-residue sequence as the defining structure.
Long-term storage of the dry powder is typically described at minus twenty degrees Celsius or colder, while shorter holding periods may use ordinary refrigeration. Repeated warming and cooling cycles are discouraged because they stress the material and can promote aggregation or loss. Light exposure and residual moisture are both treated as avoidable sources of degradation, and working aliquots are often prepared to limit how many times a container is opened. Sealed vials with a desiccant are the usual container.
Quality assessment rests on two separate questions: whether the chain is the intended one, and how much of the sample is that chain. Reverse-phase high-performance liquid chromatography with ultraviolet detection is the standard purity measurement, while mass spectrometry confirms identity through the observed molecular mass. Amino acid analysis and sequence verification provide further checks. A reported purity percentage describes the proportion of the sample represented by the main peak, not the amount of peptide by mass, since counter-ions and water make up part of any lyophilized lot.
Terminology in the literature is not fully standardised. Papers and product listings use BPC-157, BPC 157, and the longer phrase stable gastric pentadecapeptide BPC 157 interchangeably, and synonyms such as bepecin or PL 14736 appear in older or company-linked publications. Purity claims and reported masses can also differ between sources because peptide preparations may include counterions, residual solvents, or bound water. This variability complicates direct comparison of results across studies and makes the exact identity and grade of a given sample worth verifying. Discussions of the compound should therefore specify the source, salt form, and stated purity where those are known.
BPC-157 is a synthetic peptide composed of fifteen amino acid residues, with the sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. Its name derives from body protection compound, a term used for a protein fraction identified in human gastric juice. Researchers in Zagreb first reported the pentadecapeptide in the early 1990s and described it as a stable fragment of that larger protein. The compound is also catalogued as PL 14736 and, in some commercial contexts, as bepecin. Its molecular formula is C62H98N16O22 and its monoisotopic mass is approximately 1419 daltons.
Most published work on BPC-157 consists of preclinical studies, including rodent models of tissue injury, gastrointestinal lesions, and vascular or tendon damage, together with in vitro cell assays. Reviews frequently note that the mechanisms proposed in these papers remain incompletely characterised and that findings have not been confirmed in large randomised human trials. The compound is widely sold as a research chemical rather than a licensed medicine, and labels commonly carry a statement that it is not for human use. Whether any of the reported animal effects translate to humans is an open question rather than an established result.
Purity is ordinarily reported as a percentage from reverse-phase high-performance liquid chromatography, where the area of the main peak is compared with the total peak area. Identity is confirmed by mass spectrometry, since the measured mass can be checked against the value calculated from the sequence. Some certificates also include amino acid analysis or sequence confirmation by tandem mass spectrometry. A single purity number does not describe the profile of related impurities, so the underlying chromatogram and spectrum usually carry more information than the headline figure.
Material of this kind is sold for laboratory research, and labels typically state that it is not intended for human or veterinary use. In many countries it is not an approved medicine, and sports antidoping rules place it among prohibited non-approved substances. Buyers commonly review a certificate of analysis, an independent test report, and the declared storage conditions. Batch-to-batch variation in purity and in counterion content is possible, and how much that variation affects experimental outcomes remains an open question.
When in point detonate mode the projectile's high explosive detonates when it hits a target. In point detonate delay mode the high explosive detonates a brief instant after it hits a target. The delay is intended to let the projectile first penetrate a wall, and explode when it emerges on the other side. In air burst mode the cannon's aiming system programs the munition to explode in the air above the target. When the gunner aims their sight on the desired target, and presses their trigger halfway, the aiming system calculates the range to the target. They can then raise their sight slightly above the target, and when they pull the trigger all the way the aiming system will instruct the round to explode in the air above the target. Enemies hiding behind an obstacle can then be killed or wounded without blowing a hole through the obstacle. The XM1203 Armor Piercing Fin Stabilized Discarding Sabot with Tracer. The projectile itself is 50 mm in diameter, encasing a long thin dart, designed to pierce armored vehicles. A light "sabot" grips the barrel's rifling, in order for the shell to get the full power of the expanding gas. Tracer rounds have a button of pyrotechnic chemical that leaves a trail to help a gunner observe the trajectory/path of the shot. The XM1202 Target Practice-Tracer round is a full-bore training round 50 mm in diameter. With the intended purpose of drill firing and gun ballistic tests, the XM1202 round likely shares similar ballistic performance to the XM1204 HEAB-T round.
Anirudh Ravichander composed Darbar's soundtrack and score, marking his second collaboration with Rajinikanth after Petta (2019) and also with director A. R. Murugadoss after Kaththi (2014). "Thalaivar Theme", an instrumental theme for the film, was released on 7 November 2019 to accompany the motion poster. The film's first single "Chumma Kizhi", whose lyrics were written by Vivek and sung by S. P. Balasubrahmanyam, was released on 27 November 2019. The film's album was launched on 7 December 2019 at Jawaharlal Nehru Indoor Stadium, Chennai, in the presence of the film's cast and crew; it was made available to stream through the online streaming platform Gaana on the same day. The film's soundtrack has an unreleased hidden song titled "Kannula Thimiru", which was recorded by trans-woman singers Chandramukhi, Rachana and Priya Murthi, and was performed live at the film's audio launch. For the song, Anirudh engaged veteran composer Deva to conduct the song's brass section; a making-of video of the song was released in mid January 2020 and went viral on the internet. Sify stated "the soundtrack album is quite disappointing as compared to Rajinikanth's earlier film Petta, due to the unimpressive lyrics but it touches the listener's soul and enables them to sing along".
== Scope == EARS-Net tracks resistance rates reported in routine clinical antimicrobial susceptibility data from local and clinical laboratories, gathered by national surveillance programs and laboratory networks. Resistance status is determined according to EUCAST guidelines. Only data from invasive isolates (blood and cerebrospinal fluid) are included in EARS-Net. The antibiotics for which resistance is tracked varies by species, and is based on EUCAST recommendations. Resistance data is collected for these eight pathogens only:
Sources: en.wikipedia.org
6 December Scientists provide a mechanistic biological explanation for why upper respiratory tract infections are more prevalent in the cold or winter season, previously largely explained only by behavioral and environmental variations. They found cold exposure impairs extracellular vesicle (EV) swarm–mediated antiviral immunity in the nose – fewer EVs are secreted and they become less effective. Impossible Metals announces its first underwater robotic vehicle, 'Eureka 1', has completed its first trial of selectively harvesting polymetallic nodule rocks from the seabed nearly without harming the environment (as with other seabed mining) to help address the rising global need for metals for renewable energy system components, mainly batteries. Researchers propose "significantly increasing freshwater through the capture of humid air over oceans" to address present and, especially, future water scarcity/insecurity. Emulate researchers assess advantages of using liver-chips predicting drug-induced liver injury which could reduce the high costs and time needed in drug development workflows/pipelines, sometimes described as the pharmaceutical industry's "productivity crisis". 7 December Scientists report that two-million years old genetic material was found in Greenland, and is currently considered the oldest DNA discovered so far. Scientists propose a new supergroup of eukaryotes, termed Provora – predators of other microorganisms which have been overlooked due to numerical rarity.
== Applications == HPTLC finds extensive application in various fields, including pharmaceutical industries, clinical chemistry, forensic chemistry, biochemistry, cosmetology, food and drug analysis, environmental analysis, and more, owing to its numerous advantages. It distinguishes itself by being the only chromatographic method capable of presenting results as images and offers simplicity, cost-effectiveness, parallel analysis of samples, high sample capacity, rapid results, and the option for multiple detection methods. Le Roux's research team assessed HPTLC for determining salbutamol serum levels in clinical trials and concluded that it is a suitable method for analyzing serum samples. HPTLC has proven valuable in lichenology for analyzing and identifying lichen substances. Compared to standard TLC, the technique offers several advantages for screening lichen compounds: it allows twice as many samples to be run on one plate, requires significantly less solvent (4 mL per plate versus 250 mL), completes chromatographic separation in under 10 minutes per plate, and can detect substances at much lower concentrations. The method's increased sensitivity has enabled detection of previously unidentified lichen compounds and revealed greater chemical variation within lichen species. Since the early 1990s, HPTLC has been used as an improved alternative to standard TLC for routine screening of lichen substances, though proper plate drying is critical as the technique is more sensitive to atmospheric humidity than standard TLC.
The impact is heavy on editors, journalism and society, but we will never remain silent. Almost a thousand people work in the head office. We are far from ignoring their feelings of insecurity in their workplace. Our social rights and democracy are under unbearable pressure, and we must all fight together. From these attacks, we learned a lot of things, notably that we must always remain vigilant. Over the years, foreign media outlets also reported on the Moroccan mafia, particularly in Germany, Spain, Italy, Brazil, Colombia, Chile, Morocco, and the United Kingdom. BBC News stated in 2019 that the Netherlands was in the process of becoming a narco-state.
Sources: en.wikipedia.org
The High Court of England and Wales gives its approval to legal challenges against the Home Office by Braintree District Council in Essex and West Lindsey District Council in Lincolnshire over plans to use two former airbases in the areas, Wethersfield Airbase and RAF Scampton, to house asylum seekers. The former Manchester City footballer Benjamin Mendy is cleared of raping a woman and attempting to rape another, following a three-week trial at Chester Crown Court. Abbott Laboratories, producers of the FreeStyle Libre app, used by around 200,000 people with diabetes in the UK, temporarily withdraw the app from the App Store after technical problems with an update caused it to stop working on Apple devices in the UK. Just Stop Oil protesters interrupt the first night of the Proms at London's Royal Albert Hall. 15 July – The Local Government Association calls for disposable vapes to be banned in England and Wales by 2024, citing their environmental impact and their appeal to children. 17 July A report from the National Audit Office concludes that the UK government is likely to miss its 2019 target to build 40 new NHS hospitals by 2030. As train drivers begin a six-day overtime ban, their union, ASLEF, announces a further six day overtime ban from 31 July. 18 July The first British passports are issued featuring King Charles III. A BBC investigation into working conditions at McDonald's has collected together a number of allegations of sexual assault, harassment, bullying and racism.
==== Affinity proteomics ==== Affinity proteomics uses antibodies or other affinity reagents (such as oligonucleotide-based aptamers) as protein-specific detection probes. Currently this method can interrogate several thousand proteins, typically from biofluids such as plasma, serum or cerebrospinal fluid (CSF). A key differentiator for this technology is the ability to analyze hundreds or thousands of samples in a reasonable timeframe (a matter of days or weeks); mass spectrometry-based methods are not scalable to this level of sample throughput for proteomics analyses.
showed that the RNA polymerase ribozyme, which they described, can be synthesized in situ from the ligation of four smaller fragments, akin to a recombination of Azoarcus ribozyme from four inactive oligonucleotide fragments described earlier. Apart from a substantial contribution of the above experiments to the research on the origin of life, they have not proven the existence of hypercycles experimentally.
=== Determination of protein sequences === With their success in improving the analysis time for amino acids, Stein and Moore began to determine the structure of an entire protein molecule, specifically bovine ribonuclease, in the early 1950s. They determined the entire sequence of ribonuclease by 1960. This sequence combined with X-ray analysis of the crystallized ribonuclease lead to the determination of the nuclease's active site. Stein won a Nobel Prize in Chemistry in 1972 with Moore and Christian Boehmer Anfinsen, for their work on ribonuclease and "for their contribution to the understanding of the connection between chemical structure and catalytic activity of the ribonuclease molecule."
Sources: en.wikipedia.org
It is a synthetic fifteen-amino-acid peptide whose sequence matches part of a protein found in human gastric juice. It is made by chemical synthesis, not purified from tissue. The name derives from an early fragment label, not from a molecular weight.
The sequence corresponds to a segment of a naturally occurring gastric protein, so related sequence material exists in the body. The peptide itself as sold and studied is a laboratory-synthesized product. Whether an identical free peptide circulates naturally is not established.
No major regulatory agency has approved it as a medicine for any indication. It appears in research supply channels and, in some jurisdictions, in compounded preparations. Clinical use therefore sits outside standard approved-product pathways, and regulatory status varies by country.
It is not authorized as a medicine in the United States or the European Union. Regulatory treatment varies by jurisdiction, and in several places it is handled as a research chemical. Therapeutic claims are not supported by large human trials.