Everything below concerns gastric juice protein. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-07-24. Where a claim depends on a specific study, the study is described rather than over-claimed.
The main chemical liabilities of this sequence are peptide-bond hydrolysis and possible aspartate-related reactions, since the peptide contains aspartic acid residues but no cysteine, methionine, or tryptophan. Absence of those three residues removes the most common oxidation and disulfide pathways from consideration. Studies of related peptides indicate that aspartate isomerisation and aspartimide formation occur most readily at Asp-Gly and Asp-Ala positions, and open questions remain about how quickly those reactions proceed under ordinary laboratory conditions. Storage guidance typically emphasises cool, dry, dark conditions to slow hydrolysis.
Identity and purity are usually assessed with reversed-phase high-performance liquid chromatography, often paired with mass spectrometry using electrospray or MALDI ionisation. Amino acid analysis and peptide mapping by enzymatic digestion provide additional sequence-level confirmation. Purity is commonly reported as an area percentage from a chromatographic trace, and water content can be measured by Karl Fischer titration. Reported masses may differ by tens of daltons between sources because preparations can contain acetate or trifluoroacetate counterions, and such differences are not by themselves evidence of a different peptide.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Lyophilised material; shade varies slightly between lots |
| Solubility in water | Freely soluble | Dissolves in water, saline, and aqueous buffers |
| Solubility in nonpolar solvents | Poorly soluble | Not compatible with oils or hydrocarbon solvents |
| Typical storage temperature | About −20 °C | Lyophilised, dry, dark storage slows hydrolysis |
| Common purity method | Reversed-phase HPLC | Area percentage, usually paired with mass spectrometry |
Identity and purity are usually assessed by reversed-phase high-performance liquid chromatography with ultraviolet detection near 214 nanometers, a wavelength that captures the peptide backbone. The main peak area is reported as a percentage of total peak area, which serves as a conventional purity figure. Mass spectrometry provides an independent check on molecular mass and helps confirm the expected sequence. Additional tests may include amino acid analysis and water content determination. Results are only comparable when the same column, gradient, and detection settings are used.
Peptides are susceptible to hydrolysis, oxidation, and aggregation, and BPC-157 is no exception. The lyophilized powder form is generally more stable than a solution because residual moisture is low and molecular mobility is reduced. Once dissolved, the peptide is exposed to water, oxygen, and trace metal ions that accelerate degradation. Light exposure and repeated freeze-thaw cycles are also commonly cited as sources of loss. These general principles guide most handling recommendations found in supplier documentation.
Published work on BPC-157 spans several decades and covers a wide range of experimental models. Much of the early literature reports outcomes in animal studies involving induced injury to the gastrointestinal tract, tendons, and other tissues. The volume of preclinical reports is large, while controlled human trials remain scarce. This imbalance is a recurring point of discussion, because animal findings do not automatically translate into human effects. Reviews often note that study designs differ substantially across laboratories.
Interest in the peptide has grown through online communities that discuss self-administered use, which sits outside formal research settings. Regulatory status varies by country, and in many jurisdictions the compound is not approved as a therapeutic product. Questions about optimal routes of administration, long-term effects, and dose-response relationships remain open. Published pharmacokinetic data in humans are limited, and much of what circulates in popular discussion is extrapolated from animal work rather than measured directly in people.
BPC-157 is a synthetic peptide built from fifteen amino acids, referred to in the literature as a pentadecapeptide. Its sequence was derived from a larger protein found in human gastric juice, commonly called body protection compound. Researchers first described the fragment in the early 1990s and named it after the parent protein plus a numeric identifier. The peptide does not correspond to a single marketed medicine; it is primarily a laboratory research material. Suppliers distribute it as a lyophilized powder intended for experimental use.
The ambient temperature 1H NMR spectrum shows two methyl signals, indicative of hindered rotation about the (O)C−N bond. At temperatures near 100 °C, the 500 MHz NMR spectrum of this compound shows only one signal for the methyl groups. DMF is miscible with water. The vapour pressure at 20 °C is 3.5 hPa. A Henry's law constant of 7.47 × 10−5 hPa·m3/mol can be deduced from an experimentally determined equilibrium constant at 25 °C. The partition coefficient log POW is measured to −0.85. Since the density of DMF (0.95 g·cm−3 at 20 °C) is similar to that of water, significant flotation or stratification in surface waters in case of accidental losses is not expected.
Platelet membrane glycoproteins are surface glycoproteins found on platelets (thrombocytes) which play a key role in hemostasis. When the blood vessel wall is damaged, platelet membrane glycoproteins interact with the extracellular matrix.
=== Differential diagnosis === Ullrich congenital muscular dystrophy (UCMD) involves mutations on the same genes as Bethlem myopathy, but has a more severe presentation, with the ability to walk (ambulation) typically being lost between the ages of 5–15 years. Autosomal recessive myosclerosis myopathy is allelic to the COL6A2 gene, it includes multiple contractures of the joints with slender muscles which are infiltrated by connective tissue and fibrosis, giving them a firm, "woody" feel upon palpitation. The symptoms of Bethlem myopathy may overlap with other conditions including Emery–Dreifuss muscular dystrophy, congenital muscular dystrophies, limb girdle muscular dystrophies, FHL1-related myopathies (X-linked myopathy with postural muscle atrophy, reducing body myopathy, and scapuloperoneal myopathy), and some forms of Ehlers–Danlos syndrome. Tubular aggregate myopathy (TAM1 & TAM2) includes, among other symptoms, contractures, muscle weakness, and fatty atrophy of muscle. Typical to Bethlem myopathy 1 and 2 are the presence of multiple contractures. A contracture can be caused by a variety of reasons, from disease to lifestyle (see Muscle contractures). If the patient lacks multiple contractures, as well as lacks other common symptoms of Bethlem myopathy, and in addition has muscular symptoms which are not known to be associated with Bethlem myopathy such as muscle hypertrophy, exercise-induced (dynamic) symptoms rather than fixed muscle weakness (static) symptoms, or cardiac involvement such as arrhythmia, then other myopathies should be considered.
=== Oxides === Curium readily reacts with oxygen forming mostly Cm2O3 and CmO2 oxides, but the divalent oxide CmO is also known. Black CmO2 can be obtained by burning curium oxalate (Cm2(C2O4)3), nitrate (Cm(NO3)3), or hydroxide in pure oxygen. Upon heating to 600–650 °C in vacuum (about 0.01 Pa), it transforms into the whitish Cm2O3:
== Antivenom == Antivenom, or antivenin, is commonly used to treat the effects of local and systemic pit viper envenomations. The first step in the production of crotaline antivenom is collecting ("milking") the venom of a live rattlesnake—usually from the western diamondback (Crotalus atrox), eastern diamondback (Crotalus adamanteus), South American rattlesnake (Crotalus durissis terrificus), or fer-de-lance (Bothrops atrox). The extracted venom is then diluted and injected into horses, goats, or sheep, whose immune systems produce antibodies that protect from the toxic effects of the venom. These antibodies accumulate in the blood, which is then extracted and centrifuged to separate the red blood cells. The resulting serum is purified into a lyophilized powder, which is packaged for distribution and later use by human patients. Because antivenom is derived from animal antibodies, people generally display an allergic response during infusion, known as serum sickness.
Sources: en.wikipedia.org
As an antagonist at ionotropic AMPA, NMDA and Kainate glutamate receptors in the concentration range of 0.1-2.5 mM. As a noncompetitive antagonist at the glycine site of the NMDA receptor. As an antagonist of the α7 nicotinic acetylcholine receptor. However, recently (2011) direct recording of α7 nicotinic acetylcholine receptor currents in adult (noncultured) hippocampal interneurons by the Cooper laboratory validated a 2009 study that failed to find any blocking effect of kynurenic acid across a wide range of concentrations, thus suggesting that in noncultured, intact preparations from adult animals there is no effect of kynurenic acid on α7 nicotinic acetylcholine receptor currents. As a ligand for the orphan G protein-coupled receptor GPR35. As an agonist for the G protein-coupled receptor HCAR3.
=== Refinements === Cornelis Van Niel made key discoveries explaining the chemistry of photosynthesis. By studying purple sulfur bacteria and green bacteria, he was the first to demonstrate that photosynthesis is a light-dependent redox reaction in which hydrogen reduces (donates its atoms as electrons and protons to) carbon dioxide. Robert Emerson discovered two light reactions by testing plant productivity using different wavelengths of light. With the red alone, the light reactions were suppressed. When blue and red were combined, the output was much more substantial. Thus, there were two photosystems, one absorbing up to 600 nm wavelengths, the other up to 700 nm. The former is known as PSII, the latter is PSI. PSI contains only chlorophyll "a", PSII contains primarily chlorophyll "a" with most of the available chlorophyll "b", among other pigments. These include phycobilins, which are the red and blue pigments of red and blue algae, respectively, and fucoxanthol for brown algae and diatoms. The process is most productive when the absorption of quanta is equal in both PSII and PSI, assuring that input energy from the antenna complex is divided between the PSI and PSII systems, which in turn powers the photochemistry. Robert Hill thought that a complex of reactions consisted of an intermediate to cytochrome b6 (now a plastoquinone), and that another was from cytochrome f to a step in the carbohydrate-generating mechanisms. These are linked by plastoquinone, which does require energy to reduce cytochrome f.
The club was founded by members of the Royal Agricultural Society, the Melbourne Hunt Club and the Victorian Woolbrokers. The Essendon Football Club is thought to have been formed in 1872 at a meeting in the home of a well-known brewery family, the McCrackens, whose Ascot Vale property hosted a team of local junior players. Robert McCracken (1813–1885), the owner of several city hotels, was the founder and first president of the Essendon Football Club, and his son, Alex McCracken, its first secretary. Alex later became president of the newly formed VFL. Alex's cousin Collier McCracken, who had already played with Melbourne, was the team's first captain. The club played its first recorded match against the Carlton Second Twenty (the reserves) on 7 June 1873, with Essendon winning by one goal. Essendon played 13 matches in its first season, winning seven, with four draws and losing two. The club was one of the inaugural junior members of the Victorian Football Association (VFA) in 1877, and it began competing as a senior club from the 1878 season. During its early years in the Association, Essendon played its home matches at Flemington Hill, but it moved to the East Melbourne Cricket Ground in 1881. In 1878, at Flemington Hill, Essendon played its first match on what would be considered by modern standards to be a full-sized field. In 1879, Essendon played Melbourne in one of the earliest night matches recorded when the ball was painted white.
=== A public-health approach === A common critical view holds that the war on drugs has been costly and ineffective largely because US federal and state governments have chosen the wrong methods, focusing on interdiction and punishment rather than regulation and treatment of drug abuse and addiction. In the US, current public health-oriented interventions include harm reduction, drug courts, and Law Enforcement Assisted Diversion (LEAD) programs which give police treatment or social services options rather than arrest with minor drug offenses. Harm reduction approaches include provision of sterile syringes, medically supervised injection sites (SIF), and availability of the opioid overdose-countering drug naloxone. As an alternative to imprisonment, drug courts in the US identify substance-abusing offenders and place them under strict court monitoring and community supervision, as well as provide them with long-term treatment services. According to a National Drug Court Institute report, 16.4% of the nation's drug court graduates are rearrested and charged with a felony within one year of completing the program; overall 44.1% of released prisoners end up back in prison within one year. The drug court program is also significantly cheaper than imprisonment. Annual per offender cost is $20,000–$50,000 for imprisonment, and $2,500–$4,000 in the drug court system. A survey by the Substance Abuse and Mental Health Services Administration (SAMHSA) found that substance abusers who remain in treatment longer are less likely to resume their former drug habits.
== Applications == EC-MS (Electron-capture mass spectrometry) has been used for identifying trace levels of chlorinated contaminants in the environment such as polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), and other polychlorinated compounds. Pesticide derivatives, nitrogen containing herbicides, and phosphorus-containing insecticides have also been detected in EC-MS. Bile acids can detected in various body fluids by using GC-EC-MS. Oxidative damage can also be monitored in trace amounts by analyzing oxidized phenylalanine using GC-EC-MS.
Sources: en.wikipedia.org
Lyophilised peptide powders are generally kept frozen or refrigerated, dry, and protected from light. Sealed vials limit moisture uptake and slow hydrolysis. Such guidance comes from general peptide chemistry rather than from stability studies specific to every product.
Reversed-phase HPLC is the standard approach, with purity expressed as a percentage of total peak area. Mass spectrometry confirms the expected molecular mass and can reveal adducts or truncated sequences. Neither method on its own establishes biological activity.
Small mass differences often reflect different counterions, such as acetate versus trifluoroacetate, or bound water rather than a different amino acid sequence. Mass spectrometry can distinguish these forms when the ionisation conditions are known. Exact sequence confirmation requires peptide mapping or tandem mass spectrometry.
BPC-157 is a synthetic fifteen-amino-acid peptide whose sequence corresponds to a fragment of a protein found in human gastric juice. It is studied mainly in preclinical research and is not an approved pharmaceutical product in major markets. Materials sold for laboratory use are typically labelled as research chemicals.