If you have been reading about gastric juice protein 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 2025-09-12. Numbers and descriptions here follow the published literature rather than marketing material.
BPC-157 is a synthetic pentadecapeptide whose sequence is commonly given as Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. It is described in the literature as a fragment of a larger protein found in human gastric juice, referred to as body protection compound. The peptide was first characterized in the early 1990s by a research group in Zagreb, Croatia. Its molecular formula is C62H98N16O22 and its monoisotopic mass is approximately 1419 daltons.
Supplied material is typically a lyophilized white to off-white powder. The peptide is freely soluble in water and in common aqueous buffers, which allows it to be handled as a stock solution. Because the sequence contains no cysteine, disulfide cross-linking is not a route of degradation. The absence of aromatic residues means ultraviolet absorbance at 280 nm is minimal, so quantification usually relies on peptide bond absorbance near 214 nm or on amino acid analysis.
Lyophilized material is generally reported as stable for extended periods when kept cold, dry, and protected from light. In solution, the main degradation routes for a peptide of this type are hydrolysis of peptide bonds and aggregation. The sequence contains no cysteine, so disulfide-driven oxidation is not a primary concern, though methionine and tryptophan are also absent. Stability depends on pH, buffer composition, and concentration, with acidic conditions often reported as more favorable than neutral or alkaline ones. Repeated freeze-thaw cycles can promote aggregation, and how fast degradation proceeds at room temperature in specific formulations remains an open question.
Handling practice centers on limiting moisture, heat, and mechanical stress. Powder is typically allowed to reach room temperature before opening so that condensation does not form on the contents, and solutions are prepared with sterile or low-particulate water. Peptides can adsorb to certain plastics and membrane filters, so container and filter material is sometimes specified to reduce losses at low concentrations. Working aliquots are usually frozen separately rather than sampled repeatedly from one stock. Recording lot number, preparation date, and storage conditions supports later comparison between experiments.
Identity and purity are usually assessed by reversed-phase high-performance liquid chromatography, which separates the target peptide from truncated sequences and other synthesis by-products. Mass spectrometry, typically electrospray ionization coupled to liquid chromatography, confirms the expected mass and helps detect modifications. Amino acid analysis can verify composition when residue-level confirmation is needed. Because common impurities differ from the target by only one or two residues, chromatographic resolution often matters more than a single headline purity percentage. Impurity profiles are most informative when compared against a validated reference standard.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white lyophilized powder | Assessed by visual inspection under ordinary laboratory lighting |
| Molecular mass | Approximately 1419 Da | Monoisotopic mass for the fifteen-residue sequence |
| Solubility class | Freely soluble in water | Stock solutions commonly prepared in water or aqueous buffer |
| Typical storage temperature | -20 °C or below, desiccated | Lyophilized powder; repeated freeze-thaw cycles are usually avoided |
| Common analytical method | Reversed-phase HPLC with UV detection | Frequently paired with mass spectrometry to confirm identity |
In its common research form the peptide is supplied as a lyophilized powder. It dissolves readily in water and in typical aqueous buffers, which simplifies preparation of working solutions. Laboratories usually prepare small aliquots instead of one large volume. The dry material appears as a white to off-white solid with no distinctive odor. Bulk quantities are typically shipped in sealed vials.
Lyophilized material is generally kept cold, commonly at minus twenty degrees Celsius, and shielded from moisture and light. Solutions are less stable than the dry powder, so repeated freeze-thaw cycles are avoided by splitting the material into single-use portions. Published stability data for this particular peptide are limited, which means suggested hold times should be read as provisional. Long-term refrigeration of reconstituted solutions is not well supported by available evidence.
Identity and purity are checked with standard peptide techniques. Reversed-phase high-performance liquid chromatography separates the main peak from closely related impurities and yields a percentage purity. Mass spectrometry confirms that the measured mass matches the theoretical value. Amino acid analysis offers an independent check on overall composition. These analytical methods characterize the material itself and reveal nothing about how it behaves in a living system.
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.
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 commonly supplied as a lyophilized powder, a freeze-dried solid that is reconstituted before use in laboratory work. As a short peptide, it dissolves readily in water and in aqueous buffer solutions, and stock solutions are typically prepared in water or a mild buffer. The chain contains several proline and acidic residues, which influence how it behaves in solution. Because the solid can take up moisture, weighing and handling are usually performed under low-humidity conditions. Its solubility class is described as freely soluble in water rather than requiring an organic solvent.
Dry powder is generally stored at low temperature, with minus twenty degrees Celsius or colder advised for extended retention. Reconstituted solutions are less stable than the solid form and are normally kept cold and shielded from repeated freeze-thaw cycles. Light exposure is avoided because some peptides degrade under ultraviolet radiation. The exact rate of degradation depends on concentration, pH, and the presence of salts, so a single shelf life does not apply to every preparation. Reported stability figures should be read as indicative of typical handling rather than as universal constants.
BPC-157 is a synthetic peptide built from fifteen amino acid residues. Its sequence comes from a larger protein fragment that researchers isolated from human gastric juice and described as a body protection compound. The fragment contains glycine, glutamic acid, five prolines, lysine, alanine, two aspartic acids, leucine, and valine. The number 157 in the name refers to the position of the stretch within the parent protein. Material used in laboratories is manufactured rather than extracted from stomach fluid.
The molecule carries 15 residues, a molar mass near 1419.5 g/mol, and the formula C62H98N16O22. Its structure features a proline-rich central region, a pair of adjacent aspartic acid residues, and no cysteine. The absence of cysteine means no disulfide bonds can form, which simplifies refolding and reconstitution. Suppliers usually ship the material as a freeze-dried powder that appears white to off-white. It dissolves readily in water and in saline solutions.
As there are various ways of classifying or characterizing those who are either diagnosed or self-affirm as transgender individuals, the literature cannot clearly estimate how prevalent these experiences are within the total population. The results of a recent systematic review highlight the need to standardize the scope and methodology related to data collection of those presenting as transgender.
The Earl S. Richardson Library's is the main academic information resource center on the campus. Constructed in 2008, the building covers approximately 222,517 square feet. The library's holding constitutes over 500,000 volumes, and access to over 1 million e-books and 5,000 periodical titles. There are 167 online databases that are subscribed to the Library. Reading and studying spaces are provided with wired and wireless access to databases for research. One such collection in the volumes includes books on Africa, with an emphasis on sub-Saharan Africa. The African-American collection includes papers and memorabilia of such persons as Emmett Jay Scott, secretary to Booker T. Washington. The Forbush Collection is composed of materials associated with the Quakers and slavery. The Martin D. Jenkins Collection was acquired in 1980.
Dermorphin is a hepta-peptide first isolated from the skin of South American frogs belonging to the genus Phyllomedusa. The peptide is an agonist with high potency and selectivity to mu opioid receptors. Dermorphin is about 30–40 times more potent than morphine. The amino acid sequence of dermorphin is H-Tyr-D-Ala-Phe-Gly-Tyr-Pro-Ser-NH2. Dermorphin is not found in humans or other mammals and similar D-amino acid containing peptides have only been found in bacteria, amphibians, and molluscs. Dermorphin appears to be made via the posttranslational modification of a precursor peptide by an amino acid isomerase. This unusual process is needed because the D-alanine in this peptide is not part of the standard genetic code.
==== Metabolism ==== Scientists performed a study on NM-2-AI metabolism in silico and in vivo, in order to identify the main metabolites to be screened in the different biological samples. They performed the in silico metabolism prediction of NM-2-AI using MetaSiteTM software and subsequently verified the presence of metabolites in the blood, urine and hair of mice after NM-2-AI administration. LC-HRMS analysis identified seven main metabolites in the urine. They were identified, by their accurate masses and fragmentation patterns, as 2-aminoindane (2AI), two hydroxy-2-AI and four hydroxy-NM-2-AI; one of the hydroxy-NM-2-AI and one of the hydroxy-2-AI underwent also to conjugation. NM-2-AI and 2-AI were also detected by LC-HRMS in the hair and blood
Sources: en.wikipedia.org
The retention can be decreased by adding a less polar solvent (methanol, acetonitrile) into the mobile phase to reduce the surface tension of water. Gradient elution uses this effect by automatically reducing the polarity and the surface tension of the aqueous mobile phase during the course of the analysis. Structural properties of the analyte molecule can play an important role in its retention characteristics. In theory, an analyte with a larger hydrophobic surface area (C–H, C–C, and generally non-polar atomic bonds, such as S-S and others) can be retained longer as it does not interact with the water structure. On the other hand, analytes with higher polar surface area (as a result of the presence of polar groups, such as -OH, -NH2, COO− or -NH3+ in their structure) are less retained, as they are better integrated into water. The interactions with the stationary phase can also affected by steric effects, or exclusion effects, whereby a component of very large molecule may have only restricted access to the pores of the stationary phase, where the interactions with surface ligands (alkyl chains) take place. Such surface hindrance typically results in less retention. Retention time increases with more hydrophobic (non-polar) surface area of the molecules. For example, branched chain compounds can elute more rapidly than their corresponding linear isomers, because their overall surface area is lower.
The body is continually exposed to many species of bacteria, including beneficial commensals, which grow on the skin and mucous membranes, and saprophytes, which grow mainly in the soil and in decaying matter. The blood and tissue fluids contain nutrients sufficient to sustain the growth of many bacteria. The body has defence mechanisms that enable it to resist microbial invasion of its tissues and give it a natural immunity or innate resistance against many microorganisms. Unlike some viruses, bacteria evolve relatively slowly so many bacterial diseases also occur in other animals. If bacteria form a parasitic association with other organisms, they are classed as pathogens. Pathogenic bacteria are a major cause of human death and disease and cause infections such as tetanus (caused by Clostridium tetani), typhoid fever, diphtheria, syphilis, cholera, foodborne illness, leprosy (caused by Mycobacterium leprae) and tuberculosis (caused by Mycobacterium tuberculosis). A pathogenic cause for a known medical disease may only be discovered many years later, as was the case with Helicobacter pylori and peptic ulcer disease. Bacterial diseases are also important in agriculture, and bacteria cause leaf spot, fire blight and wilts in plants, as well as Johne's disease, mastitis, salmonella and anthrax in farm animals.
The boom of Ion exchange chromatography primarily began between 1935 and 1950 during World War II and applications and IC were significantly extended through the Manhattan Project. Ion chromatography was originally introduced by two English researchers, agricultural Sir Thompson and chemist J T Way. The works of Thompson and Way involved the action of water-soluble fertilizer salts, ammonium sulfate and potassium chloride. These salts could not easily be extracted from the ground due to the rain. They performed ion methods to treat clays with the salts, resulting in the extraction of ammonia in addition to the release of calcium. In the 1950s and 1960s, theoretical models were developed for IC for further understanding, and in the 1970s continuous detectors were utilized, paving the path for the development from low-pressure to high-performance chromatography. In 1975, "ion chromatography" was established as a name in reference to the techniques, and was thereafter used as a name for marketing purposes. Today, IC is important for investigating aqueous systems, such as drinking water. It is a popular method for analyzing anionic elements or complexes that help solve environmentally relevant problems. Likewise, it also has great uses in the semiconductor industry. Because of the abundant separating columns, elution systems, and detectors available, chromatography has developed into the main method for ion analysis. When this technique was initially developed, it was primarily used for water treatment.
Sources: en.wikipedia.org
== Clinical significance == Cavin-2/SDPR is shown to act as a metastasis suppressor by xenograft studies utilizing breast cancer cell lines. Cavin-2 may elicit its metastasis suppressor function by directly interacting with ERK and limiting its pro-survival role. Moreover, it is suggested that cavin-2 is silenced during breast cancer progression by promoter DNA methylation. Metastasis suppressor role of cavin-2 may go beyond breast cancer since tumor samples from bladder, colorectal, lung, pancreatic, and ovarian cancers as well as sarcomas also exhibited loss of cavin-2 expression.
As of 2014, multiple drugs have been used for therapeutic intervention, including lidocaine, naloxone, thiamine, lorazepam, vecuronium, etomidate, propofol, tolazoline, yohimbine, atropine, orciprenaline, metoclopramide, ranitidine, metoprolol, enoxaparin, flucloxacillin, insulin, and irrigation of both eyes with saline. The treatment after a xylazine overdose primarily involves maintaining respiratory function and blood pressure. In cases of intoxication, physicians recommend intravenous fluid infusion, atropine, and hospital observation. Severe cases may require tracheal intubation, mechanical ventilation, gastric lavage, activated charcoal, bladder catheterization, electrocardiographic (ECG) and hyperglycemia monitoring. Physicians typically recommend which detoxification treatment should be used to manage possible dysfunction involving highly perfused organs such as the liver and kidneys.
=== Intestinal colonization and sepsis === Enterohemorrhagic E. coli (EHEC) and enteropathogenic E. coli (EPEC) are pathogens that rely on OmpT to colonize in the intestine of their host. In response to the presence of E. coli in the gut, the host releases antimicrobial peptides as part of the innate immune response. Since OmpT can break down these antimicrobials and inactivate them, EHEC and EPEC can colonize within the colon or small intestine of the host and lead to serious diarrheal diseases. In the case of sepsis, the host activates the blood clotting system to deposit fibrin and limit the spread of bacteria throughout the blood. However, OmpT can inactivate the tissue factor pathway inhibitor (TFPI), counteracting the host's immune response, and further perpetuating the spread of extraintestinal E. coli infection.
Sources: en.wikipedia.org
It is a synthetic peptide built from fifteen amino acids, with a mass of roughly 1419 daltons. The sequence is reported to match a fragment of a protein present in human gastric juice. It is not a naturally circulating hormone.
It is normally supplied as a lyophilized powder in a sealed vial. The powder dissolves readily in water, and stock solutions are typically prepared shortly before use. Cold storage is standard laboratory practice.
The letters are generally read as shorthand for body protection compound. That label comes from the original research context rather than from formal nomenclature. No standardized nonproprietary name exists for the peptide.
Reversed-phase liquid chromatography with ultraviolet detection gives a purity estimate, while mass spectrometry confirms molecular mass and flags modifications. Amino acid analysis can add compositional confirmation. Results are most meaningful when a validated reference standard is run alongside the sample.