The short version of mass spectrometry fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-05-24. Anything still debated is marked as such rather than presented as settled.
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.
Published storage guidance follows general peptide practice rather than product-specific studies. The dry powder is typically kept at minus 20 degrees Celsius, away from light and moisture. Once reconstituted, solutions are generally refrigerated and used over days to weeks, because the aqueous environment slowly promotes hydrolysis and oxidation. Long-term data on degradation rates or breakdown products are sparse. Stated shelf lives from different producers vary widely, reflecting the absence of a shared reference standard.
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.
Confirmation of identity and purity relies on standard peptide analysis techniques. Reverse-phase high-performance liquid chromatography separates the peptide from related impurities and serves as the most common purity assay. Mass spectrometry, often coupled to that chromatography step, provides an accurate molecular mass that can be matched against the expected value. Amino acid analysis or sequencing can be added for further confirmation. Because short peptides can be produced by different synthetic routes, laboratories usually report both a chromatographic purity percentage and a mass confirmation rather than a single figure.
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.
| Property | Value | Notes |
|---|---|---|
| Molar mass | Approximately 1419.5 g/mol | Calculated from the reported 15-residue sequence |
| Molecular formula | C62H98N16O22 | Based on the same sequence |
| Appearance | White to off-white powder | Typical of a lyophilized preparation |
| Solubility class | Freely soluble in water | Also dissolves in saline solutions |
| Typical storage temperature | Minus 20 degrees Celsius, dry | Refrigeration advised after reconstitution |
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.
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.
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.
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.
== E == eIF-2 - eIF-2 kinase - electrochemical potential - electron - electron capture - electron configuration - electron microscopy - electron shell - electron transport chain - electron volt - electronegativity - electrophile - electrophoresis - electrophysiology - element - element symbol - ELISA - ELISPOT - embryo - embryonal development - emulsion - endergonic reaction - endodermis - endomembrane system - endoplasmic reticulum - endothelin receptor - endothelin-1 - energy decomposition cycles - energy level - enhancer - enkephalin - enthalpy - entomology - entropy - env gene product - environmental chemistry - enzyme - epidermal growth factor - epidermal growth factor receptor - epidiorite - epigenetics - epinephrine - equine gonadotropin - erbA gene - erbB gene - erbB-2 gene - erbB-2 receptor - erythropoietin - erythropoietin receptor - essential amino acid - ester - estradiol receptor - estrogen receptor - ethanol - ether - eukaryote - evolution - evolutionary biology - evolutionary developmental biology - evolutionary tree - excretion - exergonic reaction - exon - extracellular matrix protein - eye proteins
Consumption of 1–1.5 grams (1,000–1,500 mg) per day is associated with a condition known as caffeinism. Caffeinism usually combines caffeine dependency with a wide range of unpleasant symptoms including nervousness, irritability, restlessness, insomnia, headaches, and palpitations after caffeine use. Caffeine overdose can result in a state of central nervous system overstimulation known as caffeine intoxication, a clinically significant temporary condition that develops during, or shortly after, the consumption of caffeine. This syndrome typically occurs only after ingestion of large amounts of caffeine, well over the amounts found in typical caffeinated beverages and caffeine tablets (e.g., more than 400–500 mg at a time). According to the DSM-5, caffeine intoxication may be diagnosed if five (or more) of the following symptoms develop after recent consumption of caffeine: restlessness, nervousness, excitement, insomnia, flushed face, diuresis, gastrointestinal disturbance, muscle twitching, rambling flow of thought and speech, tachycardia or cardiac arrhythmia, periods of inexhaustibility, and psychomotor agitation. According to the International Classification of Diseases (ICD-11), cases of very high caffeine intake (e.g. > 5 g) may result in caffeine intoxication with symptoms including mania, depression, lapses in judgment, disorientation, disinhibition, delusions, hallucinations or psychosis, and rhabdomyolysis.
"UNODC - Bulletin on Narcotics: The narcotic pepper - The chemistry and pharmacology of Piper methysticum and related species". United Nations Office on Drugs and Crime. 1973. pp. Issue 2. Retrieved 19 February 2014. Kava ban documents Piper methysticum information from the Hawaiian Ecosystems at Risk project (HEAR) "Kava" . Encyclopædia Britannica. Vol. 14 (9th ed.). 1882.
The Portuguese colonial administration in Brazil had two objectives that would ensure colonial order and the monopoly of Portugal's wealthiest and largest colony: to keep under control and eradicate all forms of slave rebellion and resistance, such as the Quilombo of Palmares, and to repress all movements for autonomy or independence, such as the Inconfidência Mineira (1789).
=== Other countries === Austria: Word of the year (Austria), since 1999. The event is organised by the Society for Austrian German (GSÖD). Notable selections include the 52-letter word Bundespräsidentenstichwahlwiederholungsverschiebung (2016), and more recently, 'Elk Emil', in 2025. In Germany, a Wort des Jahres has been selected since 1972 (for the year 1971) by the Society of the German Language. In addition, an Unwort des Jahres (Un-word of the year or Most Unpleasant Word of the Year) has been nominated since 1991, for a word or phrase in public speech deemed insulting or socially inappropriate (such as "Überfremdung"). Similar selections are made each year since 1999 in Austria, 2002 in Liechtenstein, and 2003 in Switzerland. Since 2008, language publisher Langenscheidt supports a search for the German youth word of the year, which aims to find new words entering the language through the vernacular of young people. In addition, several German dialects have their own Wort des Jahres selection: de:Plattdeutsches Wort des Jahres, de:Wort des Jahres (Sachsen), and de:Wort des Jahres (Südtirol). In Denmark, the Word of the year has been selected by Mål og Mæle, a popular science language magazine, during 2006–2012 and since 2009 also by the Sproglaboratoriet radio program of the DR P1 radio channel in collaboration with Dansk Sprognævn (Danish Language Council). Japan has held an annual word of the year contest called the "New Word/Trendy Phrase Award" (Shingo ryūkōgo taishō) since 1984, sponsored by the Jiyu Kokuminsha publisher (by U-CAN since 2004).
Sources: en.wikipedia.org
== Functions == Riboflavin is essential to the formation of two major coenzymes, FMN and FAD. These coenzymes are involved in energy metabolism, cell respiration, antibody production, growth and development. Riboflavin is essential for the metabolism of carbohydrates, protein and fats. FAD contributes to the conversion of tryptophan to niacin (vitamin B3) and the conversion of vitamin B6 to the coenzyme pyridoxal 5'-phosphate requires FMN. Riboflavin is involved in maintaining normal circulating levels of homocysteine; in riboflavin deficiency, homocysteine levels increase, elevating the risk of cardiovascular diseases.
== Biosynthesis == NAAG synthetase activity mediates the biosynthesis of NAAG from glutamate and NAA, but little is known about the mechanism or regulation of this enzyme, and no NAAG synthetase activity has been isolated in cell-free preparations. Since other neuropeptides and nearly all vertebrate peptides are synthesized by post-translational processing, NAAG synthetase activity is relatively unique. As with NAA, the synthesis of NAAG is primarily restricted to neurons, although glial cells also contain and synthesize this peptide. In vitro, NAAG synthesis appears to be regulated by the availability of its precursor, NAA. In addition, during differentiation of neuroblastoma cells, it has been shown that a protein kinase A (PKA) activator will increase the quantity of NAAG, while a protein kinase C (PKC) activator will decrease its concentration. This finding suggests that PKA and PKC have opposing regulatory effects on the NAAG synthetase enzyme.
== Analysis == A mass spectrometer is typically utilized in one of two ways: full scan or selective ion monitoring (SIM). The typical GC–MS instrument is capable of performing both functions either individually or concomitantly, depending on the setup of the particular instrument. The primary goal of instrument analysis is to quantify an amount of substance. This is done by comparing the relative concentrations among the atomic masses in the generated spectrum. Two kinds of analysis are possible, comparative and original. Comparative analysis essentially compares the given spectrum to a spectrum library to see if its characteristics are present for some sample in the library. This is best performed by a computer because there are a myriad of visual distortions that can take place due to variations in scale. Computers can also simultaneously correlate more data (such as the retention times identified by GC), to more accurately relate certain data. Deep learning was shown to lead to promising results in the identification of VOCs from raw GC–MS data. Another method of analysis measures the peaks in relation to one another. In this method, the tallest peak is assigned 100% of the value, and the other peaks being assigned proportionate values. All values above 3% are assigned. The total mass of the unknown compound is normally indicated by the parent peak. The value of this parent peak can be used to fit with a chemical formula containing the various elements which are believed to be in the compound.
=== Support team === Mission Director and Flight Director - Red Team: Christopher C. Kraft, Jr. Flight Director - Blue Team: John D. Hodge Flight Director - White Team: Eugene F. Kranz CAPCOMs: Gus Grissom, Roger B. Chaffee, and Eugene Cernan Worldwide support and recovery team: 10,249 U.S. Department of Defense personnel, 134 aircraft, and 26 ships.
All records, in any form (including, but not limited to, written, electronic, magnetic, and optical records; and scans, x-rays, and electrocardiograms) that describe or record the methods, conduct, and/or results of a trial, the factors affecting a trial, and the actions taken. (ICH E6) Dose
Sources: en.wikipedia.org
It does not occur in the form that is supplied commercially. Its sequence matches a fragment of a larger gastric protein, and the research material is produced synthetically in a laboratory. The fragment described in the early literature is generally the same synthetic pentadecapeptide.
It marks the position of the sequence inside the original protein. The label traces back to early work fractionating gastric juice and describing a body protection compound. The figure does not refer to molecular weight or to the count of amino acids.
No. The sequence has no cysteine residues, so disulfide bridges cannot form. That feature makes it easier to handle than many small proteins that depend on multiple cysteines for structure.
The lyophilized powder is normally kept at minus twenty degrees Celsius or colder. Solutions are held at refrigerator temperature or below and protected from light. Repeated freezing and thawing is avoided because it can promote aggregation or loss of activity.