The short version of counter-ion fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-02-27 and is reviewed periodically as new material appears.
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.
BPC-157 is normally distributed as a lyophilised powder that ranges from white to off-white in appearance. The peptide dissolves readily in water, normal saline, and common aqueous buffers, and it is poorly soluble in nonpolar solvents such as hexane or vegetable oils. Lyophilised vials take up moisture if left open, which changes the mass of powder in the container and complicates any later weighing. Because the material is handled in small quantities, static and adhesion to glass or plastic can also cause noticeable losses during transfer.
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.
| 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 |
The peptide was first described in the early 1990s by a group studying gastric secretions and tissue repair. Its fifteen-residue chain is usually written as GEPPPGKPADDAGLV in single-letter code. The free peptide has the formula C62H98N16O22 and a theoretical mass near 1419.5 daltons. These identifiers are established chemical facts that can be checked against standard peptide databases. There is no ambiguity about the primary structure.
Most published findings come from rodent experiments using induced injury or surgical models. Human reports remain scarce and are largely observational, which limits how much can be stated with confidence. Questions about absorption, distribution, metabolism, and clearance in people are still open. Dose translation between species is likewise unresolved. Researchers tend to read the animal literature as a starting point rather than a settled account.
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.
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.
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.
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.
==== Asthma ==== Ketamine has been suggested as a possible therapy for children with severe acute asthma who do not respond to standard treatment. This is due to its bronchodilator effects in the respiratory system. A 2012 Cochrane review found there were minimal adverse effects reported, but the limited studies showed no significant benefit.
Short-chain scorpion toxins constitute the largest group of potassium (K+) channel-blocking peptides. An important physiological role of the KCNA3 channel, also known as KV1.3, is to help maintain large electrical gradients for the sustained transport of ions such as Ca2+ that controls T lymphocyte (T cell) proliferation. Thus KV1.3 blockers could be potential immunosuppressants for the treatment of autoimmune disorders (such as rheumatoid arthritis, inflammatory bowel disease, and multiple sclerosis). The venom of Uroplectes lineatus is clinically important in dermatology. Several scorpion venom toxins have been investigated for medical use. Chlorotoxin from the deathstalker scorpion (Leiurus quinquestriatus); the toxin blocks small-conductance chloride channels; Maurotoxin from the venom of the Tunisian Scorpio maurus blocks potassium channels. Some antimicrobial peptides in the venom of Mesobuthus eupeus; meucin-13 and meucin-18 have extensive cytolytic effects on bacteria, fungi, and yeasts, while meucin-24 and meucin-25 selectively kill Plasmodium falciparum and inhibit the development of Plasmodium berghei, both malaria parasites, but do not harm mammalian cells.
=== Toxic Death Rate === Unlike overall survival, which is based on death from any cause or the condition being treated, the toxic death rate picks up just the deaths that are directly attributable to the treatment itself. These rates are generally low to zero as clinical trials are typically halted when toxic deaths occur. Even with chemotherapy the overall rate is typically under a percent. However, the lack of systematic autopsies limits our understanding of deaths due to treatments.
Sources: en.wikipedia.org
== Backbone analogues == Nucleic acid analogues may have backbone substitutions to the sugar or phosphate components, or to both. The polyelectrolyte theory of the gene proposes that a genetic molecule require a charged backbone to function.
The first fully terrestrial vertebrates were amniotes. Like their amphibious early tetrapod predecessors, they had lungs and limbs. Amniotic eggs, however, have internal membranes that allow the developing embryo to breathe but keep water in. Hence, amniotes can lay eggs on dry land, while amphibians generally need to lay their eggs in water. The first amniotes apparently arose in the Pennsylvanian subperiod of the Carboniferous. They descended from earlier reptiliomorph amphibious tetrapods, which lived on land that was already inhabited by insects and other invertebrates as well as ferns, mosses and other plants. Within a few million years, two important amniote lineages became distinct: the synapsids, which would later include the common ancestor of the mammals; and the sauropsids, which now include turtles, lizards, snakes, crocodilians and dinosaurs (including birds). Synapsids have a single hole (temporal fenestra) low on each side of the skull. Primitive synapsids included the largest and fiercest animals of the early Permian such as Dimetrodon. Nonmammalian synapsids were traditionally—and incorrectly—called "mammal-like reptiles" or pelycosaurs; we now know they were neither reptiles nor part of reptile lineage. Therapsids, a group of synapsids, evolved in the Middle Permian, about 265 million years ago, and became the dominant land vertebrates. They differ from basal eupelycosaurs in several features of the skull and jaws, including: larger skulls and incisors which are equal in size in therapsids, but not for eupelycosaurs.
==== Obsessive–compulsive disorder ==== Clomipramine was the first drug that was investigated for and found to be effective in the treatment of OCD. In addition, it was the first drug to be approved by the FDATooltip Food and Drug Administration in the United States for the treatment of OCD. The effectiveness of clomipramine in the treatment of OCD is far greater than that of other TCAs, which are comparatively weak SRIs; a meta-analysis found pre- versus post-treatment effect sizes of 1.55 for clomipramine relative to a range of 0.67 for imipramine and 0.11 for desipramine. In contrast to other TCAs, studies have found that clomipramine and SSRIs, which are more selective SRIs, have similar effectiveness in the treatment of OCD. However, multiple meta-analyses have found that clomipramine nonetheless retains a significant effectiveness advantage relative to SSRIs; in the same meta-analysis mentioned previously, the effect sizes of SSRIs in the treatment of OCD ranged from 0.81 for fluoxetine to 1.36 for sertraline (relative to 1.55 for clomipramine). In a 2025 meta-analysis of trials in children and adolescents, clomipramine was shown to lower OCD symptoms more than a sugar pill by an average of about 4.5 points on the standard rating scale. However, the effectiveness advantage for clomipramine has not been apparent in head-to-head comparisons of clomipramine versus SSRIs for OCD. The differences in effectiveness findings could be due to differences in methodologies across non-head-to-head studies.
== External links == Clinical trial number NCT02782741 for "Study to Compare the Efficacy and Safety of Enzyme Replacement Therapies Avalglucosidase Alfa and Alglucosidase Alfa Administered Every Other Week in Patients With Late-onset Pompe Disease Who Have Not Been Previously Treated for Pompe Disease (COMET)" at ClinicalTrials.gov Clinical trial number NCT01898364 for "Safety and Efficacy Evaluation of Repeat neoGAA Dosing in Late Onset Pompe Disease Patients" at ClinicalTrials.gov Clinical trial number NCT02032524 for "Avalglucosidase Alfa Extension Study (NEO-EXT)" at ClinicalTrials.gov Clinical trial number NCT03019406 for "A Study to Assess Safety and Efficacy of Avalglucosidase Alfa Administered Every Other Week in Pediatric Patients With Infantile-onset Pompe Disease Previously Treated With Alglucosidase Alfa (Mini-COMET)" at ClinicalTrials.gov
Sources: en.wikipedia.org
== Other hormones secreted == C-peptide, which is secreted into the bloodstream in equimolar quantities to insulin. It helps to prevent neuropathy and other vascular deterioration related symptoms of diabetes mellitus. A practitioner would measure the levels of C-peptide to obtain an estimate for the viable beta cell mass. Amylin, also known as islet amyloid polypeptide (IAPP). The function of amylin is to slow the rate of glucose entering the bloodstream. Amylin can be described as a synergistic partner to insulin, where insulin regulates long term food intake and amylin regulates short term food intake.
The melanocortins are a family of neuropeptide hormones which are the ligands of the melanocortin receptors. The melanocortin system consists of melanocortin receptors, ligands, and accessory proteins. The genes of the melanocortin system are found in chordates. Melanocortins were originally named so because their earliest known function was in melanogenesis. It is now known that the melanocortin system regulates diverse functions throughout the body, including inflammatory response, fibrosis, melanogenesis, steroidogenesis, energy homeostasis, sexual function, and exocrine gland function. There are four endogenous melanocortin agonists which are derived from post-transcriptional processing of the precursor molecule proopiomelanocortin (POMC). They are adrenocorticotropic hormone (ACTH), α-melanocyte stimulating hormone (MSH), β-MSH, and γ-MSH. In addition to agonists which activate melanocortin receptors, there are two antagonists which inhibit receptor activity, agouti-signaling protein (ASIP) and agouti-related protein (AgRP). Lastly, the ligand β-defensin 3 acts as a neutral melanocortin receptor antagonist.
In 2002, Israel Prize In 2005, Louisa Gross Horwitz Prize In 2006, Wolf Prize in Chemistry along with George Feher. In 2006, The EMET Prize for Art, Science and Culture in Life Sciences, along with Professor Peretz Lavie (Medicine) and Professor Eli Keshet (Biology) In 2007, Paul Ehrlich and Ludwig Darmstaedter Prize along with Harry Noller In 2008, the Albert Einstein World Award of Science for her pioneering contributions to protein biosynthesis in the field of ribosomal crystallography and her introduction of innovative techniques in cryo bio-crystallography. In 2009, the Nobel Prize in Chemistry (co-recipient with Thomas Steitz and Venkatraman Ramakrishnan). She was the first Israeli woman to be awarded a Nobel Prize. In 2010, Wilhelm Exner Medal In 2011, Marie Curie Medal awarded by the Polish Chemical Society In 2013 she became a member of the German Academy of Sciences Leopoldina. In 2015, she was awarded Honorary Doctorates from the University of Southern California, the De La Salle University, Manila/Philippines; the Joseph Fourier University, Grenoble/France; the Medical University of Lodz, Lodz/Poland; and the University of Warwick, UK. In 2018, Elizabeth Cabezas, President of the Ecuadorian National Assembly, presented Yonath with the Presea "Asamblea Nacional de la República del Ecuador, Dra. Matilde Hidalgo de Procel" (National Assembly of Ecuador Dr. Matilde Hidalgo de Procel Medal) for scientific merit.
=== Industrial === Major potassium chemicals are potassium hydroxide, potassium carbonate, potassium sulfate, and potassium chloride. Megatons of these compounds are produced annually. KOH is a strong base, which is used in industry to neutralize strong and weak acids, to control pH and to manufacture potassium salts. It is also used to saponify fats and oils, in industrial cleaners, and in hydrolysis reactions, for example of esters. Potassium nitrate (KNO3) or saltpeter is obtained from natural sources such as guano and evaporites or manufactured via the Haber process; it is the oxidant in gunpowder (black powder) and an important agricultural fertilizer. Potassium cyanide (KCN) is used industrially to dissolve copper and precious metals, in particular silver and gold, by forming complexes. Its applications include gold mining, electroplating, and electroforming of these metals; it is also used in organic synthesis to make nitriles. Potassium carbonate (K2CO3 or potash) is used in the manufacture of glass, soap, color TV tubes, fluorescent lamps, textile dyes and pigments. Potassium permanganate (KMnO4) is an oxidizing, bleaching and purification substance and is used for production of saccharin. Potassium chlorate (KClO3) is added to matches and explosives. Potassium bromide (KBr) was formerly used as a sedative and in photography.
During Mahathir's term, Mahathir maintained a collaborative relationship with the West, despite him being an outspoken critic and prioritised development models and collaboration from elsewhere in Asia. On his first day in office, Mahathir announced that his government would prioritise strengthening ties with neighbouring ASEAN countries, particularly through closer economic cooperation. He chose neighbouring Indonesia for his first official overseas visit. Early during his tenure, a small disagreement with the United Kingdom over university tuition fees led to a boycott of all British goods led by Mahathir, in what became known as the "Buy British Last" campaign. Mahathir successfully negotiated with Indonesian President Suharto to bring the 27-year Ligitan and Sipadan dispute with Indonesia to the International Court of Justice for resolution. In a shift from his predecessors, Mahathir frequently condemned Israel and ensured Malaysian support for the Palestine Liberation Organization, although he toned down his criticisms after the Oslo Accords were agreed. He has been internationally acclaimed as the voice of the developing world. As prime minister, Mahathir undertook numerous international visits to enhance diplomatic relations, promote trade, and gather insights on foreign nations. In 1987, he was elected as the president of the International Conference on Drug Abuse and Illicit Trafficking.
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.
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.