If you have been reading about pentadecapeptide 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.
Last reviewed on 2025-12-15. Where a claim depends on a specific study, the study is described rather than over-claimed.
Early work on this family of molecules examined fractions of human gastric juice, where a larger protein was reported to protect gastrointestinal tissue in animal models. BPC 157 was designed as a shorter, more stable fragment of that protein and then studied on its own. The peptide itself is not a normal dietary component and is not present in the human body in meaningful quantities. Descriptions of its origin therefore refer to the research lineage of a laboratory molecule rather than to an endogenous or nutritional substance.
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.
Outside laboratory supply channels, the peptide is sold as a research chemical, a category that carries no requirement to demonstrate purity, identity, or freedom from contamination. Because it is not an approved medicine, products labeled BPC-157 sit in a regulatory gap in many countries, and actual content may differ from the label. Sports organizations list it among prohibited substances, so its presence in an athlete's sample can produce a doping finding regardless of how the material was obtained.
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.
| 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 |
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.
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.
Purity is ordinarily reported as a percentage from reverse-phase high-performance liquid chromatography, where the area of the main peak is compared with the total peak area. Identity is confirmed by mass spectrometry, since the measured mass can be checked against the value calculated from the sequence. Some certificates also include amino acid analysis or sequence confirmation by tandem mass spectrometry. A single purity number does not describe the profile of related impurities, so the underlying chromatogram and spectrum usually carry more information than the headline figure.
Material of this kind is sold for laboratory research, and labels typically state that it is not intended for human or veterinary use. In many countries it is not an approved medicine, and sports antidoping rules place it among prohibited non-approved substances. Buyers commonly review a certificate of analysis, an independent test report, and the declared storage conditions. Batch-to-batch variation in purity and in counterion content is possible, and how much that variation affects experimental outcomes remains an open question.
Lyophilized peptide is normally kept at minus twenty degrees Celsius or colder, away from light and moisture. Powder held under those conditions is widely treated as stable for long periods, although published stability studies for this exact sequence are sparse and often come from suppliers rather than independent laboratories. Once dissolved, solutions are generally handled cold and used within a short window, because peptide bonds can hydrolyze over time. Repeated freeze-thaw cycles are usually avoided to limit losses, and exact shelf-life figures depend on the buffer and the concentration involved.
== Adverse effects == Motixafortide can cause injection site reactions, anaphylactic shock, and hypersensitivity reactions. Tumor cell mobilization in people with leukemia, leukocytosis, potential for tumor cell mobilization, and embryo-fetal toxicity can also be caused by motixafortide.
It aids in sequencing and annotating genomes and their observed mutations. Bioinformatics includes text mining of biological literature and the development of biological and gene ontologies to organize and query biological data. It also plays a role in the analysis of gene and protein expression and regulation. Bioinformatic tools aid in comparing, analyzing, and interpreting genetic and genomic data and in the understanding of evolutionary aspects of molecular biology. At a more integrative level, it helps analyze and catalogue the biological pathways and networks that are an important part of systems biology. In structural biology, it aids in the simulation and modeling of DNA, RNA, proteins as well as biomolecular interactions.
Due to its location on the coast of the Channel, the climate of Le Havre is temperate oceanic. Days without wind are rare. There are maritime influences throughout the year. According to the records of the meteorological station of the Cap de la Heve (from 1961 to 1990), the temperature drops below 0 °C (32 °F) on 24.9 days per year and it rises above 25 °C (77 °F) on 11.3 days per year. The average annual sunshine duration is 1,785.8 hours per year. Precipitation is distributed throughout the year, with a maximum in autumn and winter. The months of June and July are marked by some thunderstorms on average 2 days per month. One of the characteristics of the region is the high variability of the temperature, even during the day. The prevailing winds are from the southwest sector for strong winds and north-north-east for breezes, snowstorms occur in winter, especially in January and February.
== Sticky-end ligation == Restriction enzymes can generate a wide variety of ends in the DNA they digest, but in cloning experiments most commonly used restriction enzymes generate a 4-base single-stranded overhang called the sticky or cohesive end (exceptions include NdeI which generates a 2-base overhang, and those that generate blunt ends). These sticky ends can anneal to other compatible ends and become ligated in a sticky-end (or cohesive end) ligation. EcoRI for example generates an AATT end, and since A and T have lower melting temperature than C and G, its melting temperature Tm is low at around 6°C. For most restriction enzymes, the overhangs generated have a Tm that is around 15°C. For practical purposes, sticky end ligations are performed at 12-16°C, or at room temperature, or alternatively at 4°C for a longer period. For the insertion of a DNA fragment into a plasmid vector, it is preferable to use two different restriction enzymes to digest the DNA so that different ends are generated. The two different ends can prevent the religation of the vector without any insert, and it also allows the fragment to be inserted in a directional manner. When it is not possible to use two different sites, then the vector DNA may need to be dephosphorylated to avoid a high background of recircularized vector DNA with no insert. Without a phosphate group at the ends the vector cannot ligate to itself, but can be ligated to an insert with a phosphate group.
and this results in a small population bias favoring the lower energy state in thermal equilibrium. With more spins pointing up than down, a net spin magnetization along the magnetic field B0 results.
Sources: en.wikipedia.org
Cholesterol is implicated in cell signaling processes, assisting in the formation of lipid rafts in the plasma membrane, which brings receptor proteins in close proximity with high concentrations of second messenger molecules. In multiple layers, cholesterol and phospholipids (both electrical insulators) can facilitate speed of transmission of electrical impulses along nerve tissue. For many neuron fibers, a myelin sheath, rich in cholesterol since it is derived from compacted layers of Schwann cell or oligodendrocyte membranes, provides insulation for more efficient conduction of impulses. Demyelination (loss of myelin) is believed to be part of the basis for multiple sclerosis. Cholesterol binds to and affects the gating of a number of ion channels such as the nicotinic acetylcholine receptor, GABAA receptor, and the inward-rectifier potassium channel. Cholesterol activates the estrogen-related receptor alpha (ERRα) and may be the endogenous ligand for the receptor. The constitutively active nature of the receptor may be explained by the fact that cholesterol is ubiquitous in the body. Inhibition of ERRα signaling by reduction of cholesterol production has been identified as a key mediator of the effects of statins and bisphosphonates on bone, muscle, and macrophages. On the basis of these findings, it has been suggested that the ERRα should be de-orphanized and classified as a receptor for cholesterol.
Kittens require a high-calorie diet that contains more protein than the diet of adult cats. Young orphaned kittens require cat milk every two to four hours, and they need physical stimulation to defecate and urinate. Cat milk replacer is manufactured to feed young kittens because cow's milk does not provide all the necessary nutrients. Human-reared kittens tend to be very affectionate with humans as adults and sometimes more dependent on them than kittens reared by their mothers, but they can also show volatile mood swings and aggression. Depending on the age at which they were orphaned and how long they were without their mothers, these kittens may be severely underweight and can have health problems later in life, such as heart conditions. The compromised immune system of orphaned kittens — due to the absence of antibodies normally found in the mother's milk — can make them especially susceptible to infections, often necessitating antibiotics.
Serotonergic psychedelics are agonists not only of the serotonin 5-HT2A receptor but also of the serotonin 5-HT2B receptor and other serotonin receptors. A potential risk of frequent repeated use of serotonergic psychedelics is cardiac fibrosis and valvulopathy caused by serotonin 5-HT2B receptor activation. However, single high doses or widely spaced doses (e.g., months) are widely thought to be safe and concerns about cardiac toxicity apply more to chronic psychedelic microdosing or very frequent use (e.g., weekly). Selective serotonin 5-HT2A receptor agonists that do not activate the serotonin 5-HT2B receptor or other serotonin receptors, such as 25CN-NBOH, DMBMPP, and LPH-5, have been developed and are being studied. Selective serotonin 5-HT2A receptor agonists are expected to avoid the cardiac risks of serotonin 5-HT2B receptor activation.
Alongside its collection of the oldest collection of insects in the new world, the Academy of Natural Sciences of Drexel University has featured Marley's insect work. For the 2016 Summer Olympics in Rio, former Nike CEO Mark Parker collaborated with Marley to develop an iridescent shoe inspired by Marley's work of the Sagra buqueti beetle. In September 2017, Marley established Pheromone Asia Studio in Beijing. This allows legal import of insect specimens into China, which was the entity to do so. Marley's work is also used to inspire youth. A university biology professor at the University of Notre Dame uses Marley's works to inspire his undergraduate biology students.
=== Other GLUT proteins === There are 14 total GLUT proteins separated into 3 classes based on sequence similarities. Class 1 consists of GLUT 1-4 and 14, class 2 contains GLUT 5, 7, 9 and 11, and class 3 has GLUT 6, 8, 10, 12 and 13. Although there are some sequence differences between all GLUT proteins, they all have some basic structural components. For example, both the N and C termini in GLUT proteins are exposed to the cytoplasm of the cell, and they all have 12 transmembrane segments.
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.
It is not approved for human use in the United States or the European Union. Clinical material has been studied in a small number of early trials, mainly for inflammatory bowel conditions, and the compound remains investigational. Regulators treat marketed products as unapproved rather than as authorized drugs.