GRF(1-29) comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2025-12-22. Where a claim depends on a specific study, the study is described rather than over-claimed.
CJC-1295 is the name used for a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. The compound was described by a Canadian drug discovery company in the mid-2000s as a long-acting research tool. Two closely related molecules share the name in practice: one carries a drug affinity complex, or DAC, group, and one does not. The distinction matters because the two behave differently in circulation.
The peptide backbone corresponds to GRF(1-29), the first 29 residues of native growth hormone-releasing hormone, which retains most of the receptor-activating activity of the full-length molecule. Four substitutions distinguish the analog from the natural sequence: D-alanine at position 2, glutamine at position 8, alanine at position 15, and leucine at position 27. These changes slow cleavage by dipeptidyl peptidase IV, the enzyme that degrades native hormone in plasma within minutes. The outcome is improved enzymatic stability combined with a still brief residence time when no additional modification is present.
Lyophilized material is typically stored at minus twenty degrees Celsius or lower. Keeping the vial dry and protected from light preserves peptide integrity. Repeated freeze-thaw cycles can cause aggregation or loss of activity. Once dissolved, solutions are generally kept at two to eight degrees Celsius. Stability data for reconstituted solutions vary, and long-term behavior is not fully established. Working aliquots reduce the number of times a stock container is opened.
Reverse-phase high-performance liquid chromatography is the standard tool for purity assessment. The technique separates the target peptide from truncated or modified byproducts. Mass spectrometry confirms molecular weight and supports sequence verification. Electrospray ionization and matrix-assisted laser desorption are both used. Amino acid analysis provides an independent check on composition. Purity values are commonly reported as area percentage from the chromatogram. Residual trifluoroacetate and water content are also measured in many quality programs.
Batch-to-batch consistency depends on solid-phase peptide synthesis and subsequent purification. Coupling efficiency, resin choice, and cleavage conditions all affect the final profile. Counter-ion content and moisture can shift the apparent mass of a batch. Documentation typically includes a certificate of analysis with chromatograms and spectra. Independent verification by a second laboratory is sometimes requested. Whether a given certificate reflects the actual vial contents depends on chain of custody. Analytical methods themselves carry uncertainty that should be stated alongside results.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | GHRH analog, not a steroid |
| Backbone length | 29 amino acids | Based on GRF(1-29) |
| Substitutions | Four positions | D-Ala2, Gln8, Ala15, Leu27 |
| Appearance | White to off-white powder | Typical lyophilized research material |
| Common synonyms | Modified GRF(1-29) | Usage varies between sources |
==== Operation Juniper Shield ==== At some point in 2013, Operation Enduring Freedom – Trans Sahara was rebadged as Operation Juniper Shield. ABC News reported that the Green Berets are also advising and assisting Niger's military to build up their fighting capability to counter the terrorist groups like al-Qaeda and ISIS. In September 2014, the Huffington post reported that members of the 19th SFG were deployed to Camp Ram Ram in Morocco as part of Operation Juniper Shield. On July 1, 2015, Army Times reported that the 3rd SFG will begin shifting its area of operations to Africa, with its focus primarily on northern and western Africa, the group expects to complete its transition out of the Middle East and Central Asia by summer 2016, as the wars in Iraq and Afghanistan wind down. Colonel Robert Wilson, the group commander, said his group "will gradually replace 10th [SFG] mission on the continent." On February 2, 2017, during a “routine administrative movement,” a Green Beret from 1st Battalion, 3rd SFG was killed and another soldier injured in a vehicle accident in Niger; according to the Stars and Stripes report Niger is a hub for special operations forces to train partner nations in north and west Africa to counter extremist groups and militants such as Boko Haram in Nigeria. On October 4, 2017, Green Berets of the 3rd SFG were ambushed. Time reported that a joint team of 12 Green Berets and 30 Nigerien troops were conducting a two-day reconnaissance mission along the Niger-Mali border.
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=== Catabolic pathway (catabolism) === A catabolic pathway is a series of reactions that bring about a net release of energy in the form of a high energy phosphate bond formed with the energy carriers adenosine diphosphate (ADP) and guanosine diphosphate (GDP) to produce adenosine triphosphate (ATP) and guanosine triphosphate (GTP), respectively. The net reaction is, therefore, thermodynamically favorable, for it results in a lower free energy for the final products. A catabolic pathway is an exergonic system that produces chemical energy in the form of ATP, GTP, NADH, NADPH, FADH2, etc. from energy containing sources such as carbohydrates, fats, and proteins. The end products are often carbon dioxide, water, and ammonia. Coupled with an endergonic reaction of anabolism, the cell can synthesize new macromolecules using the original precursors of the anabolic pathway. An example of a coupled reaction is the phosphorylation of fructose-6-phosphate to form the intermediate fructose-1,6-bisphosphate by the enzyme phosphofructokinase accompanied by the hydrolysis of ATP in the pathway of glycolysis. The resulting chemical reaction within the metabolic pathway is highly thermodynamically favorable and, as a result, irreversible in the cell.
Sources: en.wikipedia.org
==== Paid leave while on Family and Medical Leave Act leave ==== The temporary tax credit for employers who give paid leave to an employee while they are on Family and Medical Leave Act leave has been made permanent. In order to qualify for the tax credit, the employer must pay the employee at least 50% of the employee's usual wages. The amount of the tax credit used to be equal to 12.5% of eligible wages paid to an eligible employee, but it now increases by 0.25% for each percentage point paid above the 50% threshold, up to a maximum credit of 25%. In order to be eligible for the tax credit, the employee must have worked at least six months for the employer, which is up from 12 months previously. Paid family and medical leave that is required under state or local law is now eligible for the tax credit, as are employer-paid amounts for qualifying paid leave insurance policies.
==== Extraterritorial data access ==== The CLOUD Act allows United States authorities to request data from covered service providers, including some AI service providers, regardless of where the data is physically stored. Courts can require parent companies to provide data held by their subsidiaries, and such orders may be accompanied by nondisclosure requirements preventing the provider from notifying affected users. This framework has been described in legal commentary as creating legal tension with Article 48 of the General Data Protection Regulation (GDPR), which restricts the transfer of personal data in response to foreign court or administrative orders unless based on an international agreement. As a result, service providers operating in both jurisdictions may face competing legal obligations under U.S. and EU law.
Amifostine (ethiofos) is a cytoprotective adjuvant used in cancer chemotherapy and radiotherapy involving DNA-binding chemotherapeutic agents. It is marketed by Clinigen Group under the trade name Ethyol.
For over fifty years, Padre Pio of Pietrelcina reported stigmata which were studied by several 20th-century physicians, whose independence from the Church is not known. The observations were reportedly inexplicable and the wounds never became infected. His wounds healed once, but reappeared. The wounds were examined by Luigi Romanelli, chief physician of the City Hospital of Barletta, for about one year. The physician Angelo Maria Merla noted that the wounds were not tubercular in origin but could not make an official diagnosis without further tests. The surgeon Giorgio Festa, a private practitioner, also examined them in 1920 and 1925. Professor Giuseppe Bastianelli, physician to Pope Benedict XV, examined the wounds, but no report of his examinations was made. Pathologist Amico Bignami of the University of Rome also observed the wounds, describing them as shallow. Festa, who had originally agreed with Bignami, later described the wounds as superficial when covered with a scab. Giorgio Festa noted that "at the edges of the lesions, the skin is perfectly normal and does not show any sign of edema, of penetration, or of redness, even when examined with a good magnifying glass". Alberto Caserta took X-rays of the hands in 1954 and found no abnormality in the bone structure. Giuseppe Sala who worked as a physician for Pio between 1956 and 1968 commented that tests revealed his blood had no signs of abnormality. There were both religious and non-religious critics who accused Padre Pio of faking his stigmata, saying he used carbolic acid to make the wounds.
Sources: en.wikipedia.org
Nickel-48, discovered in 1999, is the most neutron-poor nickel isotope known. With 28 protons and 20 neutrons 48Ni is "doubly magic" (like 208Pb) and therefore much more stable, with a half-life around 3 milliseconds, than would be expected from its position in the chart of nuclides. It has the highest ratio of protons to neutrons (proton excess) of any known doubly magic nuclide.
In 2006, the US Food and Drug Administration (FDA) approved the use of Exubera, the first inhalable insulin. It was withdrawn from the market by its maker in 2007 due to lack of acceptance. Inhaled insulin claimed to have similar efficacy to injected insulin, both in terms of controlling glucose levels and blood half-life. Currently, inhaled insulin is short-acting and is typically taken before meals; an injection of long-acting insulin at night is often still required. When people were switched from injected to inhaled insulin, no significant difference was observed in HbA1c levels over three months. Accurate dosing was a particular problem, although people showed no significant weight gain or pulmonary function decline over the length of the trial when compared to the baseline. Following its commercial launch in 2005 in the United Kingdom, it was not (as of July 2006) recommended by National Institute for Health and Clinical Excellence for routine use, except in cases where there is "proven injection phobia diagnosed by a psychiatrist or psychologist". In January 2008, the world's largest insulin manufacturer, Novo Nordisk, also announced that the company was discontinuing all further development of the company's own version of inhalable insulin, known as the AERx iDMS inhaled insulin system. Similarly, Eli Lilly and Company ended its efforts to develop its inhaled Air Insulin in March 2008.
Fish oil is a commonly used fatty acid supplement because it is a source of omega-3 fatty acids. Fatty acids are strings of carbon atoms, having a range of lengths. If links are all single (C−C), then the fatty acid is called saturated; with one double bond (C=C), it is called monounsaturated; if there are two or more double bonds (C=C=C), it is called polyunsaturated. Only two fatty acids, both polyunsaturated, are considered essential to be obtained from the diet, as the others are synthesized in the body. The "essential" fatty acids are alpha-linolenic acid (ALA), an omega-3 fatty acid, and linoleic acid (LA), an omega-6 fatty acid. ALA can be elongated in the body to create other omega-3 fatty acids: eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Plant oils, particularly seed and nut oils, contain ALA. Food sources of EPA and DHA are oceanic fish, whereas dietary supplement sources include fish oil, krill oil and marine algae extracts. The European Food Safety Authority (EFSA) identifies 250 mg/day for a combined total of EPA and DHA as Adequate Intake, with a recommendation that women pregnant or lactating consume an additional 100 to 200 mg/day of DHA. In the United States and Canada are Adequate Intakes for ALA and LA over various stages of life, but there are no intake levels specified for EPA and/or DHA. Supplementation with EPA and/or DHA does not appear to affect the risk of death, cancer or heart disease. Furthermore, studies of fish oil supplements have failed to support claims of preventing heart attacks or strokes.
In Australia, ketamine is listed as a Schedule 8 controlled drug under the Poisons Standard (October 2015). In Canada, ketamine has been classified as a Schedule I narcotic since 2005. In December 2013, the government of India, in response to rising recreational use and the use of ketamine as a date rape drug, added it to Schedule X of the Drug and Cosmetics Act, requiring a special license for sale and maintenance of records of all sales for two years. In the United Kingdom, it was labeled a Class B drug on 12 February 2014. In 2025, the Home Office requested a review of the classification with a view to changing it to Class A, based on an increase in recreational use and the negative health consequences. The increase in recreational use prompted ketamine to be placed in Schedule III of the United States Controlled Substances Act in August 1999.
The club was founded by members of the Royal Agricultural Society, the Melbourne Hunt Club and the Victorian Woolbrokers. The Essendon Football Club is thought to have been formed in 1872 at a meeting in the home of a well-known brewery family, the McCrackens, whose Ascot Vale property hosted a team of local junior players. Robert McCracken (1813–1885), the owner of several city hotels, was the founder and first president of the Essendon Football Club, and his son, Alex McCracken, its first secretary. Alex later became president of the newly formed VFL. Alex's cousin Collier McCracken, who had already played with Melbourne, was the team's first captain. The club played its first recorded match against the Carlton Second Twenty (the reserves) on 7 June 1873, with Essendon winning by one goal. Essendon played 13 matches in its first season, winning seven, with four draws and losing two. The club was one of the inaugural junior members of the Victorian Football Association (VFA) in 1877, and it began competing as a senior club from the 1878 season. During its early years in the Association, Essendon played its home matches at Flemington Hill, but it moved to the East Melbourne Cricket Ground in 1881. In 1878, at Flemington Hill, Essendon played its first match on what would be considered by modern standards to be a full-sized field. In 1879, Essendon played Melbourne in one of the earliest night matches recorded when the ball was painted white.
Sources: en.wikipedia.org
No. It is a laboratory-made analog of growth hormone-releasing hormone. The natural hormone is a 44-residue peptide, while the analog is built on a shorter 29-residue fragment.
The original material included a linker that binds serum albumin. A later variant removed that linker to reduce the duration of action. Catalogs and papers did not consistently adopt separate names, so both remain widely labeled with the same term.
The amino acid sequence and the presence or absence of the linker group. Mass measured by spectrometry gives an independent check that separates the two forms.
The powder is normally held at minus twenty degrees Celsius or below. Light and moisture exposure should be minimized. Repeated warming and cooling cycles are avoided.