The short version of nitric oxide fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-11-02. Anything still debated is marked as such rather than presented as settled.
Common synonyms in catalogs include pentadecapeptide BPC 157, BPC157, and the full sequence name. A CAS registry number in the 137525-51-0 range is frequently listed, though the assignment should be verified against the supplier certificate of analysis. The name itself is not a pharmacopoeial designation, and there is no standardized international nonproprietary name. Distinguishing genuine material from related fragments generally requires mass spectrometry, since several truncated sequences share similar chromatographic behavior.
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.
Identity and purity are established with complementary methods rather than one test. Reverse-phase high-performance liquid chromatography separates the main peak from deletion sequences and oxidized variants, and its area percentage is the usual purity figure. Mass spectrometry confirms the expected molecular mass and can flag truncations or modifications that chromatography alone might miss. Amino acid analysis and peptide mapping add sequence-level confirmation, while residual counter-ion and water content are measured separately.
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.
| 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 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.
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.
Published studies on BPC-157 are dominated by animal models. Commonly used endpoints include healing of surgically induced lesions in the stomach, tendon-to-bone attachment after transection, and recovery from experimentally induced vascular or intestinal damage. Many of these reports come from a small number of research groups, and the peptide is often described as acting across a wide range of tissue types. That breadth is itself a point of discussion, since one molecule influencing many unrelated systems is unusual.
Human data are far more limited than animal data. A small number of clinical reports exist, generally with few participants and without the randomization or blinding expected in later-phase trials. No large, independently replicated human trial has appeared in the indexed peer-reviewed literature. Statements about effects in people therefore rest on extrapolation from animal work rather than on direct evidence, and the strength of that extrapolation remains an open question rather than a settled matter.
BPC-157 is a synthetic peptide composed of fifteen amino acids. Its sequence corresponds to part of a protein found in human gastric juice, which is the origin of the "body protection compound" label. In laboratory work the material is treated as a defined research chemical rather than a finished product. Published research has centered on animal models, and the peptide is not an approved medicine in most countries.
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.
BPC-157 is a synthetic peptide of fifteen amino acids, written as GEPPPGKPADDAGLV, whose sequence matches part of a larger protein identified in human gastric juice. That parent protein was described in stomach-secretion research, and the fifteen-residue fragment was named body protection compound, which gives the peptide its common label. Material used in experiments is produced by solid-phase peptide synthesis rather than extracted from tissue. The reported molecular weight is about 1419 daltons, and the chain contains several proline residues, a feature that appears in discussions of its resistance to enzymatic breakdown.
Most published findings come from rodent models, where the peptide has been examined in wound-healing, gastrointestinal-lesion, tendon, and vascular-injury preparations. A smaller number of early human studies have been reported, chiefly in inflammatory bowel conditions, but the public record is short and has not led to marketing approval in the United States or the European Union. Reviewers therefore classify the compound as investigational, and whether animal results carry over to people remains an open question rather than a settled one.
== Evolution == It is believed that moonlighting proteins came about by means of evolution through which uni-functional proteins gained the ability to perform multiple functions. With alterations, much of the protein's unused space can provide new functions. Many moonlighting proteins are the result of the gene fusion of two single function genes. Alternatively a single gene can acquire a second function since the active site of the encoded protein typically is small compared to the overall size of the protein leaving considerable room to accommodate a second functional site. In yet a third alternative, the same active site can acquire a second function through mutations of the active site. The development of moonlighting proteins may be evolutionarily favorable to the organism since a single protein can do the job of multiple proteins conserving amino acids and energy required to synthesize these proteins. However, there is no universally agreed upon theory that explains why proteins with multiple roles evolved. While using one protein to perform multiple roles seems advantageous because it keeps the genome small, we can conclude that this is probably not the reason for moonlighting because of the large amount of noncoding DNA.
complex A molecular entity formed by loose association between two or more component molecular entities (ionic or uncharged), or the corresponding chemical species. The bonding between the components is normally weaker than in a covalent bond. See also coordination complex.
Founder, Professionals with Alzheimer's. For services to Charity. Kenneth Salter. For services to the community in Ellesmere Port, Cheshire. Cheryl Anne Sanderson. For services to Cancer Patients in Barnsley, South Yorkshire. David Saunders. For services to the community in Middlesbrough, North Yorkshire. Annie Groat Scott. For services to the community in Westray, Orkney. Pamela Mary Joyce Scull (Pamela Wingfield). Founder Principal, Wingfield School of Ballet and Dance. For services to Dance and to the community in Bristol. Sanjay Shambhu. Councillor, South Gloucestershire Council and Chair, BAME Conservatives. For Political Service. John Frederick Sharman. For services to the community in Peterborough, Cambridgeshire. Janice Sheward. Director, Cancer United. For services to People with Cancer in West Sussex. Darren Keith Sims. Founder, Daz's Rock 4 Charity. For Charitable Fundraising for Disabled and Disadvantaged Young People. Ian Robert Skinner. For services to the community in Sidmouth and the Sid Valley, Devon. Angela Ann Smith. Lately Deputy Manager, Process Controls Team, Defence Business Services. For services to Defence and to Charity. Carl Smith. Advanced Paramedic in Critical Care, East of England Ambulance Service NHS Trust, Head, Clinical Development for Emergency and Critical Care, College of Paramedics and Firefighter, Norfolk Fire and Rescue Service. For services to the NHS and to Fire and Rescue. Cheryl Barbara Smith. Leader, Girlguiding Cornwall. For services to Young People. John Alexander Alister Smyth.
== Controversy == At the 68th AACC Annual Scientific Meeting in 2016, Elizabeth Holmes, CEO and founder of Theranos, spoke at what AACC described as a “special session.” Holmes, who the Centers for Medicare and Medicaid Services (CMS) had recently been banned from owning, operating or directing a blood testing service for a period of two years, was invited to present scientific data on her company's much discussed Edison device. Instead, Holmes took the opportunity to unveil a new product dubbed miniLab. Several people on the Theranos scientific advisory board were members of the association.
Eventually, the GLP-1 derivatives Mojsov synthesized, without her knowledge were patented as peptides able to prompt the release of insulin, but with Joel Habener as the sole-creator. Mojsov fought to have her name included in patents, with MGH eventually agreeing to amend four patents to include her name and she received her one-third of drug royalties for one year. She has continued to speak up for credit after her collaborators received various awards as new versions of GLP-1 have been approved and grown popular.
Sources: en.wikipedia.org
Opium (also known as poppy tears, or Lachryma papaveris) is the dried latex obtained from the seed capsules of the opium poppy Papaver somniferum. Approximately 12 percent of opium is made up of the analgesic alkaloid morphine, which is processed chemically to produce heroin and other synthetic opioids for medicinal use and for the illegal drug trade. Opium's main psychoactive alkaloids, primarily morphine, act on μ-opioid receptors, causing analgesia, with long-term use leading to tolerance and dependence. The latex also contains the closely related opiates codeine and thebaine, and non-analgesic alkaloids such as papaverine and noscapine. The traditional, labor-intensive method of obtaining the latex is to scratch ("score") the immature seed pods (fruits) by hand; The latex leaks out and dries to a sticky yellowish residue that is later scraped off and dehydrated. The English word for opium is borrowed from Latin, which in turn comes from Ancient Greek: ὄπιον (ópion), a diminutive of ὀπός (opós, 'juice of a plant'). The word meconium (derived from the Greek for "opium-like", but now used to refer to newborn stools) historically referred to related, weaker preparations made from other parts of the opium poppy or different species of poppies. The Mediterranean region holds the earliest archaeological evidence of human use of opium poppies dating back to before 5000 BCE, with cultivation beginning around 3400 BCE in Mesopotamia.
On October 2, he participated in the vice-presidential debate with Palin at Washington University in St. Louis. Post-debate polls found that while Palin exceeded many voters' expectations, Biden had still won the debate overall. On November 4, Obama and Biden were elected. As Biden was running for vice president, he was also running for reelection to the Senate, as permitted by Delaware law. Having been reelected to the Senate as well as the vice presidency, Biden made a point of not resigning from the Senate before he was sworn in for his seventh term in January 2009. He resigned from the Senate on January 15.
There are evidence-based indications for using antipsychotics in children (e.g., tic disorder, bipolar disorder, psychosis), but the use of antipsychotics outside of those contexts (e.g., to treat behavioral problems) warrants significant caution. Antipsychotics are used to treat tics associated with Tourette syndrome. Aripiprazole, an atypical antipsychotic, is used as add-on medication to ameliorate sexual dysfunction as a symptom of selective serotonin reuptake inhibitor (SSRI) antidepressants in women. Quetiapine is used to treat generalized anxiety disorder.
Over the past few decades, AMMs have diversified rapidly and their design principles, properties, and characterization methods have been outlined more clearly. A major starting point for the design of AMMs is to exploit the existing modes of motion in molecules. For instance, single bonds can be visualized as axes of rotation, as can be metallocene complexes. Bending or V-like shapes can be achieved by incorporating double bonds, that can undergo cis-trans isomerization in response to certain stimuli (typically irradiation with a suitable wavelength), as seen in numerous designs consisting of stilbene and azobenzene units. Similarly, ring-opening and -closing reactions such as those seen for spiropyran and diarylethene can also produce curved shapes. Another common mode of movement is the circumrotation of rings relative to one another as observed in mechanically interlocked molecules (primarily catenanes). While this type of rotation can not be accessed beyond the molecule itself (because the rings are confined within one another), rotaxanes can overcome this as the rings can undergo translational movements along a dumbbell-like axis. Another line of AMMs consists of biomolecules such as DNA and proteins as part of their design, making use of phenomena like protein folding and unfolding.
Sources: en.wikipedia.org
=== Toxins === P. aeruginosa uses the virulence factor exotoxin A to inactivate eukaryotic elongation factor 2 via ADP-ribosylation in the host cell, much as the diphtheria toxin does. Without elongation factor 2, eukaryotic cells cannot synthesize proteins and necrotise. The release of intracellular contents induces an immunologic response in immunocompetent patients. In addition P. aeruginosa uses an exoenzyme, ExoU, which degrades the plasma membrane of eukaryotic cells, leading to lysis. Increasingly, it is becoming recognized that the iron-acquiring siderophore, pyoverdine, also functions as a toxin by removing iron from mitochondria, inflicting damage on this organelle. Since pyoverdine is secreted into the environment, it can be easily detected by the host or predator, resulting the host/predator migration towards the bacteria.
Kopi luwak is one of the most expensive coffees in the world, selling for between $220 and $1,100 per kilogram ($100 and $500/lb) in 2010. The price paid to collectors in the Philippines is closer to US$20 per kilogram. The specialty Vietnamese weasel coffee, which is made by collecting coffee beans eaten by wild civets, is sold at US$500 per kilogram. Most customers are Asian, especially those originating from Japan, China, and South Korea. Some specialty coffee shops sell cups of brewed kopi luwak for US$35–80.
β-Melanocyte-stimulating hormone (β-MSH) is an endogenous peptide hormone and neuropeptide. It is a melanocortin, specifically, one of the three types of melanocyte-stimulating hormone (MSH), and is produced from proopiomelanocortin (POMC). It is an agonist of the MC1, MC3, MC4, and MC5 receptors. It contains 23 amino acid residues. β-MSH is also known to decrease food intake in animals such as rats, chicken due to the effect of proopiomelanocortin (POMC). Research was performed to see the effect β-MSH has on chicks, and it has been found that chicks responded with a decrease in food and water intake when treated with β-MSH. The experiment showed that β-MSH causes anorexigenic effects in chicks.
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.
Low temperature slows the chemical reactions, such as oxidation and hydrolysis, that break down a peptide chain. Water and oxygen are the main drivers of degradation, so a cold and dry environment extends usable life. Actual shelf life depends on the batch, the salt form, and the container.