A practical reference on DAC group: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-05-27. Anything still debated is marked as such rather than presented as settled.
Two related forms appear under the CJC-1295 name. The simpler analogue, commonly written as modified GRF(1-29), carries the four substitutions but no additional conjugation. The second form attaches a maleimidopropionic acid linker to a lysine residue, a modification frequently called the drug affinity complex. That linker reacts with the free thiol on serum albumin to form a covalent bond. Because albumin has a long residence time in blood, the conjugated peptide stays in circulation far longer than the unconjugated analogue.
Receptor level activity follows the canonical GHRH pathway. The peptide binds the GHRH receptor, a class B G protein coupled receptor on somatotroph cells of the anterior pituitary. Binding raises intracellular cyclic AMP, which promotes calcium entry and the release of growth hormone into the bloodstream. Because the molecule acts at the same receptor as the endogenous hormone, its effect is superimposed on the natural pulsatile rhythm rather than replacing it. Whether sustained receptor occupation leads to desensitization is not fully settled.
The core sequence keeps the receptor-binding region of GHRH while replacing four positions that are vulnerable to dipeptidyl peptidase-4 and other proteases. Substitutions at positions 2, 8, 15, and 27 raise metabolic stability relative to the natural hormone. The N-terminal residues remain essential for activity, so changes there generally lower potency. Molecular weight sits near 3368 daltons for the tetrasubstituted analog without the linker, while the albumin-binding form is heavier because of the added maleimide group.
CJC-1295 is a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. Its sequence corresponds to the first twenty-nine residues of human GHRH, with four substitutions that slow enzymatic breakdown. Early descriptions placed the compound in research on growth hormone deficiency and related conditions, and later literature groups it with the long-acting GHRH analogs. The name appears in both laboratory and popular fitness writing, where it sometimes labels chemically different peptides.
Two related peptides circulate under the CJC-1295 label, and they differ mainly in how long they persist in circulation. The version carrying a drug affinity complex includes a maleimidopropionic acid linker that forms a covalent bond with serum albumin. The other version, usually written as modified GRF(1-29) or tetrasubstituted GRF(1-29), lacks that linker and is cleared quickly. Mixing the two produces inconsistent readings of published half-life values, because the linker rather than the receptor-facing sequence drives most of the difference.
| Property | Value | Notes |
|---|---|---|
| Peptide class | Synthetic GHRH analogue | Built on a 29 residue sequence |
| Primary target | GHRH receptor (GHRHR) | Class B G protein coupled receptor |
| Unconjugated half life | Minutes | Limited by protease degradation |
| Key modification | Four residue substitutions | Positions 2, 8, 15 and 27 |
| Common synonym | Modified GRF(1-29) | Usually denotes the form without DAC |
Two principal forms appear in the literature and in research supply. One carries a drug affinity complex, a maleimide-based group that forms a covalent bond with circulating albumin. This linkage slows clearance and produces a long-lasting elevation of peptide levels. The other form lacks that group and is often labeled MOD GRF(1-29). It has a much shorter circulation time. Both variants retain the same core receptor-binding sequence. Reported half-lives differ substantially between the two.
At the pituitary, the peptide binds the growth hormone-releasing hormone receptor on somatotroph cells. Receptor activation raises intracellular cyclic AMP and triggers release of stored growth hormone. Somatostatin and other hypothalamic signals modulate this response. Negative feedback from insulin-like growth factor 1 also influences output. The same regulatory architecture operates with the native hormone. Whether the synthetic analog alters feedback dynamics over repeated exposure remains an open question. Most published receptor work uses cell models rather than intact human systems.
Naming in this area is inconsistent, and readers should treat product labels with care. In much of the literature and in vendor catalogs, the unqualified term refers to the albumin-binding version, while the version lacking the DAC group appears as modified GRF(1-29), mod GRF(1-29), or the same name with a without-DAC qualifier. Because one abbreviation has been applied to both materials, the only reliable way to identify a sample is to check the stated sequence and the presence of the linker.
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.
=== Serotonin norepinephrine reuptake inhibitor === Venlafaxine (Effexor) from the SNRI class may be moderately more effective than SSRIs; however, it is not recommended as a first-line treatment because of the higher rate of side effects, and its use is specifically discouraged in children and adolescents.
== Function == The protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra-and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This full transporter is a member of the MRP subfamily which is involved in multi-drug resistance. This protein functions as a multispecific organic anion transporter, with oxidized glutathione, cysteinyl leukotrienes, and activated aflatoxin B1 as substrates. This protein also transports glucuronides and sulfate conjugates of steroid hormones and bile salts. Alternative splicing by exon deletion results in several splice variants but maintains the original open reading frame in all forms.
In both meetings, according to him, "the good relations between Brazil and the Holy See and the harmonious collaboration between Church and State in favour of the promotion of moral values and the common good" were highlighted.
The 2021 edition of Fastlane would be the beginning of WWE phasing out the standalone WWE Network, with the company partnering with other platforms to distribute its content. Beginning with that edition of Fastlane in the United States, events began airing on NBCUniversal's streaming service, Peacock, following a merger of the American WWE Network under Peacock in March that year. The standalone version of the American WWE Network shut down on April 4. Over the next couple of years, other countries would see their own version of the WWE Network merge under other services. In Indonesia, the WWE Network merged under Disney+ Hotstar in January 2022, followed by a merger under Disney+ in the Philippines in November that year, while in Australia, it merged under Binge in January 2023 and then Abema in Japan that October. With this increased emphasis of digital platforms over traditional PPV outlets, WWE began to refer to all PPV and livestreaming events as "Premium Live Events" (PLEs), starting with the Day 1 event on January 1, 2022. In January 2025, the majority of the countries that still had the WWE Network merged under Netflix, with only a small number of countries maintaining the WWE Network due to pre-existing contracts. Beginning with Wrestlepalooza in September 2025, ESPN's direct-to-consumer streaming service assumed the streaming rights for main roster PLEs in the United States as part of a five-year deal following WWE's contract with Peacock. Also as part of the deal, select events also air on ESPN's linear channels.
Pickston founded Skinny Revolution to help people to lose weight after she gained 7 stone in 14 months, partly whilst pregnant, using a Wegovy (semaglutide) injection, which is a 2.4 mg injectable prescription medicine used as an appetite suppressant. Pickston is engaged to former West Ham United co-chairman David Sullivan. She has a son, Jake, with her former husband Mark Pickston. She lives in Hale Barns, in the house which was filmed for the Real Housewives of Cheshire episodes that she appeared in.
Sources: en.wikipedia.org
Although neptunium halide compounds have not been nearly as well studied as its oxides, a fairly large number have been successfully characterized. Of these, neptunium fluorides have been the most extensively researched, largely because of their potential use in separating the element from nuclear waste products. Four binary neptunium fluoride compounds, NpF3, NpF4, NpF5, and NpF6, have been reported. The first two are fairly stable and were first prepared in 1947 through the following reactions:
== Side effects and contraindications == The withdrawal of troglitazone has led to concerns of the other thiazolidinediones also increasing the incidence of hepatitis and potential liver failure, an approximately 1 in 20,000 individual occurrence with troglitazone. Because of this, the FDA recommends two to three month checks of liver enzymes for the first year of thiazolidinedione therapy to check for this rare but potentially catastrophic complication. To date, 2008, the newer thiazolidinediones, rosiglitazone and pioglitazone have been free of this problem. The main side effect of all thiazolidinediones is water retention, leading to edema, generally a problem in less than 5% of individuals, but a big problem for some and potentially, with significant water retention, leading to a decompensation of potentially previously unrecognized heart failure. Therefore, thiazolidinediones should be prescribed with both caution and patient warnings about the potential for water retention/weight gain, especially in patients with decreased ventricular function (NYHA grade III or IV heart failure). Though older studies suggested there may be an increased risk of coronary heart disease and heart attacks with rosiglitazone, pioglitazone treatment, in contrast, has shown significant protection from both micro- and macro-vascular cardiovascular events and plaque progression. These studies led to a period of Food and Drug Administration advisories (2007 – 2013) that, aided by extensive media coverage, led to a substantial decrease in rosiglitazone use.
and encode amino acids by recoding the amino acids using the six categories proposed by Margaret Dayhoff. Reduced amino acid alphabets are viewed as a way to reduce the impact of compositional variation and saturation. Importantly, evolutionary patterns can vary among genomic regions and thus different genomic regions can fit with different substitution models. Actually, ignoring heterogeneous evolutionary patterns along sequences can lead to biases in the estimation of evolutionary parameters, including the Ka/Ks ratio. In this regard, the use of mixture models in phylogenentic frameworks is convenient to better mimic the molecular evolution observed in real data.
Operation Protea had exposed a glaring lack of professionalism on the part of FAPLA units, which had relied too heavily on their Soviet advisers and were almost immediately routed once they had to leave their fortified bases. In terms of training, morale, organisation, and professional competence—including the ability to operate its own equipment with effectiveness—the Angolan army had proved decidedly vulnerable. Protea indicated that it was in no condition to repel or even inflict serious losses on the South African expeditionary troops, resulting in a ratio of casualties almost overwhelmingly in the SADF's favour. That debacle led to a greater FAPLA dependency on augmented Cuban forces and another large arms deal, valued in excess of one billion dollars, being signed with the Soviet Union. Defence expenditures increased to consume 50% of Angola's state budget by the end of 1982. FAPLA embarked on a massive recruiting drive, purchased new T-54/55 and T-62 tanks from the Soviet Union, and took delivery of about thirty new combat aircraft, including twelve Sukhoi Su-20 strike fighters. It also ordered more air search radars and surface-to-air missiles to replace those destroyed in Protea. While Namibianisation altered the tactical realities of the war on the Cutline, the SADF was planning a fourth operation modelled after Sceptic, Protea, and Daisy. In April 1982, PLAN insurgents killed 9 South African soldiers near Tsumeb, over 200 kilometres south of the border.
Sources: en.wikipedia.org
=== Chemical analyses === Blotting paper is used in chemical analyses as stationary phase in thin-layer chromatography. Blotting paper is also used in pool/spa maintenance to measure pH balance. Small squares of blotting paper attached to disposable plastic strips are impregnated with pH sensitive compounds usually extracted from lichens, especially Roccella tinctoria. These strips are used similarly to litmus strips, however filter paper is usually used for litmus strips, generally to allow for the property of diffusion.
=== Melamine production and use in China === Melamine is commonly produced from urea, mainly by either catalyzed gas-phase production or high pressure liquid-phase production, and is soluble in water. Melamine is used combined with formaldehyde to produce melamine resin, a very durable thermosetting plastic, and melamine foam, a polymeric cleaning product. The end products include counter-tops, fabrics, glues and flame retardants. Occasionally, melamine-formaldehyde resin is added to gluten for non-food purposes, such as adhesives or fabric printing. Melamine is also a byproduct of several pesticides, including cyromazine. The Food Safety and Inspection Service (FSIS) of the United States Department of Agriculture (USDA) provides a test method for analyzing cyromazine and melamine in animal tissues in its Chemistry Laboratory Guidebook which "contains test methods used by FSIS Laboratories to support the Agency's inspection program, ensuring that meat, poultry, and egg products are safe, wholesome and accurately labeled." In 1999, in a proposed rule published in the Federal Register regarding cyromazine residue, the United States Environmental Protection Agency (EPA) proposed "remov[ing] melamine, a metabolite of cyromazine from the tolerance expression since it is no longer considered a residue of concern." Melamine production in China has also been reported as using coal as raw material.
The design of the flame ionization detector varies from manufacturer to manufacturer, but the principles are the same. Most commonly, the FID is attached to a gas chromatography system. The eluent exits the gas chromatography column (A) and enters the FID detector’s oven (B). The oven is needed to make sure that as soon as the eluent exits the column, it does not come out of the gaseous phase and deposit on the interface between the column and FID. This deposition would result in loss of eluent and errors in detection. As the eluent travels up the FID, it is first mixed with the hydrogen fuel (C) and then with the oxidant (D). The eluent/fuel/oxidant mixture continues to travel up to the nozzle head where a positive bias voltage exists. This positive bias helps to repel the oxidized carbon ions created by the flame (E) pyrolyzing the eluent. The ions (F) are repelled up toward the collector plates (G) which are connected to a very sensitive ammeter, which detects the ions hitting the plates, then feeds that signal to an amplifier, integrator, and display system(H). The products of the flame are finally vented out of the detector through the exhaust port (J).
Epistles 13–14 of the first part of the Epistles of Wisdom focus on Jesus, detailing his ministry, his crucifixion by the Jews, and his descent from the cross. According to these epistles, Hamza bin Ali took him down from the cross and allowed him to return to his family, with the aim of preparing people to preach his religion. The epistle titled "Excuses and Warnings" foretells that, as a sign of the end times, Messiah Jesus "the son of Joseph and Mary", will appear in Egypt. The Jews will seize control of Jerusalem and seek revenge on the inhabitants of both Jerusalem and Acre. Subsequently, Messiah Jesus will expel the Jews from Jerusalem, and Christians will dominate Muslims until the Day of Judgment, when the divine Al-Hakim bi-Amr Allah returns to judge humanity. The author of the epistle "The Report of the Jewish and Christians" (Khabar al-Yahud wal Nasara), part of first volume of the Epistles of Wisdom, appears to have been a Druze individual. The account itself identifies him as Hamza ibn Ali, a supporter of al-Hakim's divinity and the founder of the Druze faith. Hamza ibn Ali reportedly died after al-Hakim's disappearance in 1021. In the 18th century, the Orientalist Jean Michel de Venture de Paradis mentioned obtaining a manuscript discovered in a Druze village. This manuscript contained, among other things, a description of a dialogue between al-Hakim and leaders of the Christian and Jewish communities. Additionally, it included eight letters written by al-Hakim's lieutenant, Hamza ibn Ali, with the final one titled "The Report of the Jewish and Christians".
Official website Food and Drug Administration in the Federal Register Food and Drug Administration in the Code of Federal Regulations Strategic Plan (archived) Works by Food and Drug Administration at Open Library Online books by United States Food and Drug Administration at The Online Books Page Food and Drug Administration apportionments on OpenOMB
Sources: en.wikipedia.org
The names are often used interchangeably in casual writing, but they are not strictly identical. Modified GRF(1-29) refers to the unconjugated analogue carrying only the four substitutions. The version sold as CJC-1295 with DAC includes the albumin binding linker and clears much more slowly.
DAC stands for drug affinity complex, a term describing the maleimidopropionic acid linker. This group forms a covalent bond with the cysteine residue on serum albumin after administration. The resulting adduct is what extends the circulating half life from minutes to days.
No. It is entirely synthetic and does not correspond to any known endogenous peptide. The design starts from human growth hormone releasing hormone and introduces deliberate substitutions. Any biological effect comes from mimicking the natural hormone at its receptor.
Natural GHRH is degraded quickly by dipeptidyl peptidase-4 and related enzymes, giving it a half-life measured in minutes. CJC-1295 carries substitutions that slow that breakdown, so it stays intact longer. Both act at the same pituitary receptor and produce the same class of signal.