The short version of pentadecapeptide fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-07-03 and is reviewed periodically as new material appears.
Within the research literature, the peptide is discussed through several provisional mechanisms, including cytoprotection, modulation of growth factor signaling, and interaction with the nitric oxide system. None of these mechanisms is fully characterized, and no single pathway is universally accepted. Review articles typically note the gap between consistent animal findings and sparse human evidence. The compound is classified as a research chemical rather than an approved pharmaceutical, which shapes how studies are designed, funded, and reported.
BPC-157 is a synthetic pentadecapeptide with the sequence GEPPPGKPADDAGLV, corresponding to a partial fragment of a larger protein detected in human gastric juice. The name derives from the parent protein designation BPC, an abbreviation of body protection compound, with 157 acting as a fraction or batch identifier used by the original investigators. Its molecular weight is approximately 1419 daltons, and the chain contains no unusual residues or disulfide bridges. In the literature it is described as a short, water-soluble fragment rather than a complete natural protein.
Most early work on this peptide originated in the 1990s from a research group in Zagreb, Croatia, relying on animal models and cell cultures. Reported observations included effects on gastrointestinal lesion healing, tendon fibroblast migration, and blood vessel formation under controlled laboratory conditions. These findings come predominantly from rodent studies and in vitro assays rather than from human trials. Controlled human data remain limited, and the degree to which animal results translate to human physiology is an open question rather than a settled fact.
Evidence in humans is limited. Small clinical studies have examined the peptide in contexts such as ulcerative colitis and wound healing, but participant numbers are small and independent replication is scarce. It is not approved as a medicine by major regulatory agencies and is distributed mainly as a research material or compounded preparation. Long-term human safety data are not established, and questions about absorption through non-injected routes remain open rather than resolved. Claims about its effects are best read against these gaps.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C62H98N16O22 | computed for the free peptide |
| Molecular weight | about 1419 Da | monoisotopic mass near 1418.7 |
| Amino acid count | 15 | single chain, no disulfide bonds |
| Solubility | freely soluble in water | also dissolves in saline and phosphate buffer |
| Common synonyms | pentadecapeptide BPC, BPC 157 | fragment notation varies by source |
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.
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.
The Daily Telegraph reported in April 2009 that it was manufactured in China, but it has since been made illegal there. In March 2009, Druglink magazine reported it only cost a "couple of hundred pounds" to synthesise a kilogram of mephedrone, the same month, The Daily Telegraph reported manufacturers were making "huge amounts of money" from selling it. In January 2010, Druglink magazine reported dealers in Britain spent £2,500 to ship one kilogram from China, but could sell it for £10 a gram, making a profit of £7,500. A later report, in March 2010, stated the wholesale price of mephedrone was £4000 per kilogram. In March 2011, the International Narcotics Control Board published a report about designer drugs, noting mephedrone was by then being used recreationally in Europe, North America, Southeast Asia, New Zealand and Australia. After the 2022 Russian invasion of Ukraine, existing street drugs in Russia became more expensive, leading an increasing number of Russians to turn to mephedrone. According to reports, DIY mephedrone-making kits are widely available in the country.
Protactinium is a chemical element; it has symbol Pa and atomic number 91. It is a dense, radioactive, silvery-gray actinide metal which readily reacts with oxygen, water vapor, and inorganic acids. It forms various chemical compounds, in which protactinium is usually present in the oxidation state +5, but it can also assume +4 and even +3 or +2 states. Concentrations of protactinium in the Earth's crust are typically a few parts per trillion, but may reach up to a few parts per million in some uraninite ore deposits. Because of its scarcity, high radioactivity, and high toxicity, there are currently no uses for protactinium outside scientific research, and for this purpose, protactinium is mostly extracted from spent nuclear fuel. It is also the only highly radioactive mononuclidic element that is not also monoisotopic, occurring almost exclusively through the decay of Uranium-235. The element was first identified in 1913 by Kazimierz Fajans and Oswald Helmuth Göhring and named "brevium" because of the short half-life of the specific isotope studied, 234mPa. A more stable isotope of protactinium, 231Pa, was discovered in 1917/18 by Lise Meitner in collaboration with Otto Hahn, and they named the element protactinium. In 1949, the IUPAC chose the name "protactinium" and confirmed Hahn and Meitner as its discoverers. The new name meant "(nuclear) precursor of actinium," suggesting that actinium is a product of radioactive decay of protactinium.
Lisdexamfetamine (Vyvanse, others) is an amphetamine-type medication, sold for use in treating ADHD. Its effects typically last around 14 hours. Lisdexamfetamine is inactive on its own and is metabolized into dextroamphetamine in the body. Consequently, it has a lower abuse potential (i.e., reduced effects from parenteral administration).
=== Molecular mechanisms of action === Quisqualic acid is functionally similar to glutamate, which is an endogenous agonist of glutamate's receptors. It functions as a neurotransmitter in insect neuromuscular junction and CNS. It passes the blood brain barrier and binds to cell surface receptors AMPA and Kainate receptors in the brain. AMPA receptor is a type of ionotropic glutamate receptor coupled to ion channels and when bound to a ligand, it modulates the excitability by gating the flow of calcium and sodium ions into the intracellular domain. On the other hand, kainate receptors are less understood than AMPA receptors. Although, the function is somewhat similar: the ion channel permeates the flow of sodium and potassium ions, and to a lower extent the Calcium ions. As mentioned, binding of quisqualic acid to these receptors leads to an influx of calcium and sodium ions into the neurons, which triggers downstream signaling cascades. Calcium signaling involves protein effectors such as kinases (CaMK, MAPK/ERKs), CREB-transcription factor and various phosphatases. It regulates gene expression and may modify the properties of the receptors. Sodium and calcium ions together generate an excitatory postsynaptic potential (EPSP) that triggers action potentials. It's worthwhile to mention that overactivation of glutamate receptors and kainate receptors lead to excitotoxicity and neurological damage. A greater dose of quisqualic acid over activates these receptors that can induce seizures, due to prolonged action potentials firing the neurons.
=== International System === The SI unit for elasticity and the elastic modulus is the pascal (Pa). This unit is defined as force per unit area, generally a measurement of pressure, which in mechanics corresponds to stress. The pascal and therefore elasticity have the dimension L−1⋅M⋅T−2. For most commonly used engineering materials, the elastic modulus is on the scale of gigapascals (GPa, 109 Pa).
Sources: en.wikipedia.org
The king cobra has a wide distribution throughout tropical Asia. It occurs in elevations of 2,000 m (6,600 ft) from the Terai in India and southern Nepal to the Brahmaputra River basin in Bhutan and northeast India, down to Bangladesh, Myanmar, southern China, Cambodia, Thailand, Laos, Vietnam; to the maritime Southeast Asian countries of Malaysia, Singapore, Indonesia and the Philippines. In northern India, it has been recorded in Garhwal and Kumaon, and in the Sivalik hills and terai regions of Uttarakhand and Uttar Pradesh. In northeast India, the king cobra has been recorded in northern West Bengal, Sikkim, Assam, Meghalaya, Arunachal Pradesh, Nagaland, Manipur and Mizoram. In the Eastern Ghats, it occurs from Tamil Nadu and Andhra Pradesh to coastal Odisha, and also in Bihar and southern West Bengal, especially the Sundarbans. In the Western Ghats, it was recorded in Kerala, Karnataka and Maharashtra, and also in Gujarat. It also occurs on Baratang Island in the Great Andaman chain. It may have reached the furthest west of its distributional range in extreme western India and eastern Pakistan, in the vicinity of Lahore and Palanpur. These populations have sometimes been thought to be the result of introduction by snake charmers or transport along rivers, but are now more likely considered natural populations. However, it remains uncertain if any populations continue to persist there.
=== The seismic cloak === However, it can be demonstrated through computation and visual simulation that the waves are in fact dispersed around the location of the building. The frequency range of this capability is shown to have no limitation regarding the radiated frequency. The cloak itself demonstrates no forward or back scattering; hence, the seismic cloak becomes an effective medium.
CH2=CHCH2Cl + NaOH → CH2=CHCH2OH + NaCl Allyl alcohol can also be made by the rearrangement of propylene oxide, a reaction that is catalyzed by potassium alum at high temperature. The advantage of this method relative to the allyl chloride route is that it does not generate salt. Also avoiding chloride-containing intermediates is the "acetoxylation" of propylene to allyl acetate:
== Bibliography == McNeill, A; Brose, LS; Calder, R; Bauld, L; Robson, D (February 2018). "Evidence review of e-cigarettes and heated tobacco products 2018" (PDF). UK: Public Health England. pp. 1–243. Stratton, Kathleen; Kwan, Leslie Y.; Eaton, David L. (January 2018). Stratton, Kathleen; Kwan, Leslie Y.; Eaton, David L. (eds.). Public Health Consequences of E-Cigarettes (PDF). National Academies of Sciences, Engineering, and Medicine (National Academies Press). pp. 1–774. Bibcode:2018nap..book24952N. doi:10.17226/24952. ISBN 978-0-309-46834-3. PMID 29894118. McNeill, A; Brose, LS; Calder, R; Hitchman, SC; Hajek, P; McRobbie, H (August 2015). "E-cigarettes: an evidence update" (PDF). UK: Public Health England. pp. 1–113. "Electronic Nicotine Delivery Systems and Electronic Non-Nicotine Delivery Systems (ENDS/ENNDS)" (PDF). World Health Organization WHO. August 2016. pp. 1–11. Wilder, Natalie; Daley, Claire; Sugarman, Jane; Partridge, James (April 2016). "Nicotine without smoke: Tobacco harm reduction". UK: Royal College of Physicians. pp. 1–191. "State Health Officer's Report on E-Cigarettes: A Community Health Threat" (PDF). California Tobacco Control Program. California Department of Public Health. January 2015. pp. 1–21. This article incorporates text from this source, which is in the public domain.
Sources: en.wikipedia.org
The sequence corresponds to a fragment of a protein found in human gastric juice, so related sequences are natural. The isolated fifteen-amino-acid peptide supplied for research is produced synthetically. Whether the free fragment circulates naturally in humans has not been settled.
In most jurisdictions it is not an approved medicine and is handled as a research material. Import and sale rules differ by country, and some regulators have placed it in categories that restrict human use. Status can change, so current local rules apply.
Rodent models dominate, particularly rats with induced gastric lesions, tendon injury, or vascular disruption. These designs allow controlled comparison but differ anatomically and metabolically from humans. Results from such models are commonly cited as preliminary.
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.