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 2025-10-23. Numbers and descriptions here follow the published literature rather than marketing material.
The sequence contains an unusually high proportion of proline and glycine, which limits regular secondary structure and contributes to solubility in aqueous media. The compound dissolves readily in water and in normal saline. Because it is a peptide, digestive enzymes are expected to break it down if it is swallowed, a consideration that influences the routes of administration used in animal experiments. Detailed conformational data remain limited, and published structural models are largely computational.
BPC 157 is a synthetic peptide built from fifteen amino acids. The letters stand for body protection compound, and the number is a laboratory code rather than a description of any biological feature. Its single-letter sequence is GEPPPGKPADDAGLV, which corresponds to a calculated mass near 1419.5 daltons. The material is produced by solid-phase peptide synthesis and is distributed as a lyophilized powder, not as a purified extract from a natural source.
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.
Physical descriptions in supplier documents and papers usually list the compound as a white to off-white powder. It dissolves readily in water and in common aqueous buffers, and solutions are often prepared fresh before an experiment. Molecular mass near 1419 daltons helps verify identity during mass spectrometry. The powder is somewhat hygroscopic, so moisture exposure can alter the measured mass of a sample. Purity is typically reported as a percentage from chromatographic analysis.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular weight | About 1419.5 Da | Calculated from the fifteen-residue sequence |
| Residue count | 15 amino acids | Single-letter sequence GEPPPGKPADDAGLV |
| Compound class | Synthetic peptide | Produced by solid-phase synthesis |
| Synonyms | BPC 157; pentadecapeptide BPC 157 | Naming varies across suppliers and papers |
| Appearance | White to off-white powder | Typical form of the lyophilized material |
A freeze-dried sample is generally the most stable form and is commonly held at minus twenty degrees Celsius or lower for long-term keeping, with brief transfers at room temperature. The solid is hygroscopic, so vials are warmed to ambient temperature before opening to prevent condensation from degrading the contents. Light exposure and repeated temperature cycling are both avoided in routine handling. Storage over a desiccant is a common laboratory practice that limits moisture uptake during repeated access.
Once dissolved, the material is considerably less stable than the dry solid. Aqueous solutions are usually kept cold and used within a short window, and neutral or mildly acidic buffers are preferred over strongly alkaline conditions. Freeze-thaw cycles promote aggregation and loss of material to container surfaces, so dividing a batch into single-use aliquots is standard. Adsorption to plastic and glass can lower the measured concentration, meaning solution strength may need rechecking before an experiment.
In its usual supplied form, the peptide is a white to off-white lyophilized powder that dissolves readily in water and in aqueous buffers. Powder keeps far longer than solution, so material is normally shipped and stored dry, then dissolved only when needed. Once in solution, the chain is subject to hydrolysis and the liquid supports microbial growth, and practical guidance generally treats the dissolved form as short-lived. Containers should stay sealed and desiccated, because the powder takes up moisture from air.
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.
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.
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.
Ibotenic acid, or ibotenate, also known as premuscimol or as (S)-2-amino-2-(3-hydroxyisoxazol-5-yl)acetic acid, is a naturally occurring α-amino acid found in certain Amanita mushrooms such as Amanita muscaria. It acts primarily as a potent glutamate receptor agonist and produces neurological effects. The compound is used as a brain-lesioning agent in scientific research. Ibotenic acid is a conformationally-restricted analogue of the excitatory neurotransmitter glutamate which acts as a non-selective agonist of glutamate receptors, strongly activating NMDA, group I and II metabotropic glutamate receptors, and weakly activating AMPA and kainate receptors. Taken systemically, it is a prodrug of muscimol, broken down by the liver into this more stable compound, which acts as a potent GABAA and GABAA-ρ receptor agonist. Although the compound's psychoactive effects are not well-understood, some researchers speculate that ibotenic acid itself may have stimulant-like properties. Ibotenic acid is biosynthesized from glutamic acid by hydroxylation catalyzed by an Fe(II)/2-oxoglutarate-dependent oxygenase, with subsequent conversion steps carried out by enzymes encoded within a linked biosynthetic gene cluster. Ibotenic acid is commonly used in research to create site-specific hippocampal brain lesions in rats, allowing for task relearning due to its interaction with glutamate receptors, and is favored over other agents for its selectivity and long-term stability in saline solution.
Valve time is an industry term used jokingly with game releases from Valve, used to acknowledge the difference between the "promised" date for released content stated by Valve and to the "actual" release date; "Valve Time" includes delays but also includes some content that was released earlier than expected. Valve has acknowledged the term, including tracking known discrepancies between ideal and actual releases on its public development wiki and using it in announcements about such delays. Valve ascribes delays to its mentality of team-driven initiatives over corporate deadlines.
== External links == "Calcitonin Receptors". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology. Archived from the original on 2016-03-03. Retrieved 2007-07-23. Calcitonin+receptors at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
Pevehouse, Jon C. W., Timothy Nordstron, Roseanne W. McManus, Anne Spencer Jamison (2020). "Tracking Organizations in the World: The Correlates of War IGO Version 3.0 datasets." Journal of Peace Research, 57(3), 492–503. https://www.jstor.org/stable/48596260. Roger, Charles, Sam Rowan, "The New Terrain of Global Governance: Mapping Membership in Informal International Organizations", Journal of Conflict Resolution, 67 (6): 281–310. Lundgren, Magnus, Theresa Squatrito, Thomas Sommerer, Jonas Tallberg (2023). "Introducing the Intergovernmental Policy Output Dataset (IPOD)". The Review of International Organizations 19, 117–146 (2024). https://doi.org/10.1007/s11558-023-09492-6. Eilstrup-Sangiovanni, Mette (March 2021). "What kills international organisations? When and why international organisations terminate". European Journal of International Relations. 27 (1).
Sources: en.wikipedia.org
== Molecular composition and size == Nucleic acids are generally very large molecules. Indeed, DNA molecules are probably the largest individual molecules known. Well-studied biological nucleic acid molecules range in size from 21 nucleotides (small interfering RNA) to large chromosomes (human chromosome 1 is a single molecule that contains 247 million base pairs). In most cases, naturally occurring DNA molecules are double-stranded and RNA molecules are single-stranded. There are numerous exceptions, however—some viruses have genomes made of double-stranded RNA and other viruses have single-stranded DNA genomes, and, in some circumstances, nucleic acid structures with three or four strands can form. Nucleic acids are linear polymers (chains) of nucleotides. Each nucleotide consists of three components: a purine or pyrimidine nucleobase (sometimes termed nitrogenous base or simply base), a pentose sugar, and a phosphate group which makes the molecule acidic. The substructure consisting of a nucleobase plus sugar is termed a nucleoside. Nucleic acid types differ in the structure of the sugar in their nucleotides–DNA contains 2'-deoxyribose while RNA contains ribose (where the only difference is the presence of a hydroxyl group). Also, the nucleobases found in the two nucleic acid types are different: adenine, cytosine, and guanine are found in both RNA and DNA, while thymine occurs in DNA and uracil occurs in RNA. The sugars and phosphates in nucleic acids are connected to each other in an alternating chain (sugar-phosphate backbone) through phosphodiester linkages.
Hays higher than 10% NSC may be used, but it is recommended to soak it for at least one hour before feeding in cold water, which can help reduce NSC levels, although this method is not always a reliable way to adequately drop them to acceptable levels. Obese horses are usually fed hay at a level of 1.5% ideal body weight, which may be dropped to 1% of body weight if no weight loss is realized after 30 days. However, feeding less than 1% of body weight in forage is not recommended, since secondary problems such as hyperlipemia and stereotypies can occur, and insulin resistance may actually be worsened. Removal of concentrates from the diet may be sufficient to produce weight loss in obese horses. Hays are often low in vitamin A, vitamin E, copper, zinc, and selenium. A vitamin and mineral supplement is added to the diet to ensure adequate nutrition. Ration balancers, which are low in calories but offer protein, vitamins, and minerals, are often recommended.
== Awards and honors == 2018 Elected fellow of the American Academy of Microbiology 2020 American Society for Microbiology Award for Research and Leadership in Clinical Microbiology Academy of Clinical Laboratory Physicians and Scientists Ellis S. Benson Award "40 Under 40" honoree by the American Society for Clinical Pathology
Sources: en.wikipedia.org
It is a synthetic peptide. Its design was inspired by a fragment of a protein found in human gastric juice, but the fifteen-amino-acid molecule itself is made in a laboratory and is not a normal component of food or of human tissue in appreciable amounts.
The number is an internal laboratory designation from the research group that first described the fragment. It does not encode a molecular weight, a receptor target, or a measured biological effect, and it carries no meaning outside the naming history of the compound.
It contains fifteen amino acid residues and has a calculated mass of roughly 1419.5 daltons. That places it in the short-peptide range, well below the size of small proteins, which affects how it is synthesized, purified, and analyzed.
The letters BPC stand for body protection compound. The number 157 refers to a specific fragment designation from early work on gastric proteins. The full name is a label for a synthetic fifteen-amino-acid peptide rather than a naturally isolated drug.