The short version of freeze-dried powder fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-08-13 and is reviewed periodically as new material appears.
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.
Identity and purity are established using reversed-phase high-performance liquid chromatography, which separates the peptide from related impurities and yields a percentage purity. Mass spectrometry, typically with electrospray ionization, confirms the molecular mass against the expected value. Amino acid analysis or peptide mapping provides additional sequence confirmation. These methods are complementary, since chromatography measures how much material is present while mass spectrometry verifies what that material is. A certificate of analysis normally reports both.
Analytical results depend on the column, gradient, and detector wavelength chosen by the laboratory, so purity values from different sources are not always directly comparable. Water content, counterion form, and residual trifluoroacetate affect both mass and purity calculations. Microbiological and endotoxin testing are separate from chemical purity and are not covered by a standard chromatographic run. Buyers evaluating a material typically request the full method description rather than a single purity figure.
| 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 |
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.
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.
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.
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.
== Works cited == Bertok L, Chow D (2005). Bertok L, Chow D (eds.). Natural Immunity. Vol. 5 (1st ed.). Elsevier Science. ISBN 978-0-44451-755-5. Breinstrup, Thomas (2006). "Un revolution in le mundo scientific" [A revolution in the scientific world]. Historia de interlingua (in Interlingua). Archived from the original on 2019-04-27. Retrieved 2025-01-14. Chung, Kyung Won (2005). Gross Anatomy (Board Review). Lippincott Williams & Wilkins. ISBN 0-7817-5309-0. Cook, Chad E. (2012). Orthopedic Manual Therapy: An Evidence Based Approach (2nd ed.). Upper Saddle River, NJ: Pearson Education. ISBN 978-0-13-802173-3. Breinstrup, Th.; Stenström, Ingvar; Olsson, Jesper, eds. (2007) [2001]. "Biographias: Ingvar Stenström". Interlingua (in Interlingua). Archived from the original on 2019-04-26. Retrieved 2025-01-15. Dinour, Lauren M. (2019). "Speaking Out on 'Breastfeeding' Terminology: Recommendations for Gender-Inclusive Language in Research and Reporting". Breastfeeding Medicine. 14 (8). Mary Ann Liebert: 523–532. doi:10.1089/bfm.2019.0110. PMID 31364867. Fielding, Lucie (2021). Trans Sex: Clinical Approaches to Trans Sexualities and Erotic Embodiments. New York: Routledge. ISBN 978-0-429-31829-0. Edwards, Heather. "Anatomy Talk". pp. 165–168. Gopsill, Frank Peter (1990). International languages: a matter for Interlingua. Sheffield, England: British Interlingua Society. ISBN 0-9511695-6-4. OCLC 27813762. Gopsill, Frank Peter (1994). Interlingua today: A course for beginners. Sheffield, England: British Interlingua Society. ISBN 978-1-898017-01-1.
== Higher education == In 1928 at age 18 Hodgkin entered Somerville College, Oxford, where she studied chemistry. She graduated in 1932 with a first-class honours degree, the third woman at this institution to achieve this distinction.
Pursuant to the National Defense Act of 1920, the 82nd Division was reconstituted in the Organized Reserve on 24 June 1921, allotted to the Fourth Corps Area, assigned to the XIV Corps, and further allotted to Florida, Georgia, and South Carolina as its home area. The division headquarters was organized on 23 September 1921 at 1202-1/2 Main Street in Columbia, South Carolina. In 1923, it relocated to the Post Office Building, where it remained until activated for World War II. The 82nd Division's designated mobilization station was Camp McClellan, Alabama, also where much of the unit's annual training activities occurred in the interwar years. The headquarters usually trained at Camp McClellan, but also occasionally trained with the staff of the 8th Infantry Brigade, 4th Division. The 82nd Division's infantry regiments held their annual training primarily with the units of the 8th Infantry Brigade, while other units, such as the special troops, artillery, engineers, aviation, medical, and quartermaster units, usually trained alongside the active elements of the 4th Division at various posts in the Fourth Corps Area. For example, the division artillery trained with the units of the 13th Field Artillery Brigade at Fort Bragg, North Carolina; the 307th Engineer Regiment alongside Company A, 4th Engineer Regiment at Fort Benning, Georgia; the 307th Medical Regiment trained at the medical officers training camp at Fort Oglethorpe, Georgia; and the 307th Observation Squadron with Air Corps units at Maxwell Field, Alabama.
=== Examples === In Belews Lake North Carolina, 19 species of fish were eliminated from the lake due to 150–200 μg Se/L wastewater discharged from 1974 to 1986 from a Duke Energy coal-fired power plant. At the Kesterson National Wildlife Refuge in California, thousands of fish and waterbirds were poisoned by selenium in agricultural irrigation drainage.
Sources: en.wikipedia.org
== Further reading == World Health Organization publications: Safety and nutritional adequacy of irradiated food, WHO, Geneva, 1994 High-dose irradiation: Wholesomeness of food irradiated with doses above 10 kGy, WHO, Geneva, 1999, Technical Report Series No. 890 Facts about Food Irradiation, A series of Fact Sheets from the International Consultative Group on Food Irradiation (ICGFI), 1999, IAEA, Vienna, Austria at the Wayback Machine (archived 2006-03-16) Diehl, J.F., Safety of irradiated foods, Marcel Dekker, N.Y., 1995 (2. ed.) Satin, M., Food irradiation, Technomic, Lancaster, 1996 (2. ed.) Urbain, W.M., Food irradiation, Academic Press, Orlando, 1986 Molins, R. (ed.), Food irradiation – Principles and applications, Wiley Interscience, N.Y., 2001 Sommers, C.H. and Fan, X. (eds.), Food Irradiation Research and Technology, Blackwell Publishing, Ames, IA, 2006 The Food That Would Last Forever : Understanding the Dangers of Food Irradiation, by Gary Gibbs, Garden City Park, N.Y. : Avery Pub. Group, c1993 anon., Food Irradiation: Available Research Indicates That Benefits Outweigh Risks, RCED-00-217, August 24, 2000, Government Accountability Office, United States General Accounting Office, Resources, Community, and Economic Development Division, Washington, D.C. 20548 "Food Irradiation" Farkas, József; Mohácsi-Farkas, Csilla (March 2011). "History and future of food irradiation". Trends in Food Science & Technology. 22 (2–3): 121–126. doi:10.1016/j.tifs.2010.04.002.
"Beef was stowed on the larboard side and pork to starboard; flour, rice, and peas/beans in the wings. Stowage, as with the water casks below them, is begun from aft and worked forward. Casks in the spirit room are stowed from the forward bulkhead aft. In all cases, the largest containers are closest to the keelson, with sizes diminishing as they are laid outboard. All casks are laid bung up." Foodstuffs may well be in the hold for months, perhaps years. Two hundred years ago life ashore was tough and life at sea had the advantage that at least you would get three meals a day, however grim they may have been.
== History == Hypoglycemia was first discovered by James Collip when he was working with Frederick Banting on purifying insulin in 1922. Collip was asked to develop an assay to measure the activity of insulin. He first injected insulin into a rabbit, and then measured the reduction in blood-glucose levels. Measuring blood glucose was a time-consuming step. Collip observed that if he injected rabbits with a too large a dose of insulin, the rabbits began convulsing, went into a coma, and then died. This observation simplified his assay. He defined one unit of insulin as the amount necessary to induce this convulsing hypoglycemic reaction in a rabbit. Collip later found he could save money, and rabbits, by injecting them with glucose once they were convulsing.
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.
Bacteriostatic water or sterile saline is commonly used to dissolve the powder. The choice of solvent affects stability and preservation. Aqueous solutions are kept refrigerated and are not intended for long-term storage.