The short version of GHRH analog fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
Two related forms circulate in technical discussion under the same family name. The original version carries a drug affinity complex (DAC) that binds covalently to serum albumin after administration, and this linkage substantially extends circulation time. A second form, frequently written as modified GRF(1-29) or CJC-1295 without DAC, lacks that linker and clears much faster. The naming is a frequent source of confusion because the shorthand CJC-1295 can refer to either form depending on the source. Reports sometimes fail to specify which variant was studied.
The peptide backbone includes a D-alanine at position two, which resists cleavage by dipeptidyl peptidase IV, and several other substitutions that reduce degradation. Its molecular weight is roughly 3.4 kDa without the linker and about 3.6 kDa with it. The molecule is water soluble and is normally supplied as a lyophilized powder. Precise sequence and mass values depend on which variant is described, so technical documents usually state the exact form being referenced.
CJC-1295 is a synthetic peptide designed as a long-acting analogue of growth hormone-releasing hormone (GHRH). Its structure derives from the first 29 amino acids of native GHRH, a fragment often called GRF(1-29). Four substitutions were introduced to slow enzymatic breakdown and extend activity relative to the natural sequence. The compound was developed by ConjuChem as part of a broader effort to improve the pharmacokinetic profile of peptide hormones. It is studied in laboratory and clinical research settings rather than appearing as a naturally occurring substance.
The two variants differ dramatically in how long they persist in circulation. The form lacking the albumin-binding group has a plasma half-life measured in tens of minutes, comparable to the natural hormone fragment. The version carrying the drug affinity complex binds albumin and shows a half-life of roughly six to eight days in human studies. That figure comes from small trials that tracked hormone levels over extended periods. The physiological consequences of sustained versus pulsatile stimulation are still debated and the literature does not settle the point.
Lyophilized peptide powder is comparatively stable when kept dry, cold, and protected from light. Once dissolved, the molecule is vulnerable to deamidation, oxidation, and aggregation, with the rate depending on pH, buffer composition, and temperature. Alkaline conditions and repeated freeze-thaw cycles accelerate loss of the intact peptide. The methionine present in the native sequence is a known oxidation site, which is one reason it was replaced in the modified fragment. Suppliers typically recommend cold storage of solutions and use within a short window.
| Property | Value | Notes |
|---|---|---|
| Molecular weight (no linker) | ~3.37 kDa | Calculated from peptide sequence |
| Molecular weight (with linker) | ~3.65 kDa | Includes albumin-binding moiety |
| Appearance | White to off-white powder | Typically lyophilized |
| Solubility | Soluble in water | Also dissolves in aqueous buffers |
| Common synonyms | Modified GRF(1-29), DAC:GRF | Usage varies by source |
The distinguishing feature of the DAC form is a maleimide-containing group that reacts with the free thiol of cysteine-34 on human serum albumin. This reaction forms a covalent bond without enzymatic assistance, and it takes place after the peptide enters the bloodstream. Because albumin is abundant and long-lived, the attached peptide is carried through circulation far longer than an unmodified fragment would survive. The chemistry is a deliberate pharmacokinetic strategy rather than a change to receptor activity.
Enzymatic protection is a separate mechanism from plasma protein binding. The four substitutions in the backbone reduce recognition by dipeptidyl peptidase IV, which normally cleaves the natural hormone within minutes. Without the reactive group, this resistance still yields only a short window of activity, generally reported in the range of tens of minutes. With it, reported half-lives in early human work extended to several days. The size of that gap is the main practical distinction between the two materials.
Both forms act at the pituitary receptor for growth hormone-releasing hormone and increase growth hormone output, which in turn raises insulin-like growth factor 1. A long-acting analog produces sustained rather than pulsatile stimulation, and the physiological consequences of that pattern are not fully settled. Published human data on the extended form remain limited, and much of what circulates in discussion traces to early company reports rather than independent replication. How sustained exposure affects normal feedback remains an open question.
Characterization of this peptide relies on a small set of routine techniques. Reversed-phase high-performance liquid chromatography separates the target from truncated or oxidized by-products and yields a purity estimate when paired with ultraviolet detection near 214 nanometers. Mass spectrometry, either electrospray coupled to liquid chromatography or matrix-assisted laser desorption, confirms that the observed mass matches the value calculated for the expected sequence. Amino acid analysis, and enzymatic digestion followed by fragment mapping, are used when the sequence itself rather than the mass requires verification.
Stability depends heavily on physical state. A lyophilized powder kept dry, desiccated, and shielded from light typically holds its integrity for months to years at minus twenty degrees Celsius, and longer at minus eighty. Once dissolved, the peptide becomes far more vulnerable, since peptide bond hydrolysis, oxidation of susceptible residues, and aggregation all proceed faster in solution. Buffers near neutral pH are generally gentler than strongly acidic or alkaline conditions. Repeated freeze-thaw cycles and exposure to air-liquid interfaces during vigorous mixing cause losses that are easy to overlook.
This was partly because Paleolithic hunter-gatherers accessed a wider variety of natural foods, which allowed them a more nutritious diet and a decreased risk of famine. Many of the famines experienced by Neolithic (and some modern) farmers were caused or amplified by their dependence on a small number of crops. It is thought that wild foods can have a significantly different nutritional profile than cultivated foods. The greater amount of meat obtained by hunting big game animals in Paleolithic diets than Neolithic diets may have also allowed Paleolithic hunter-gatherers to enjoy a more nutritious diet than Neolithic agriculturalists. It has been argued that the shift from hunting and gathering to agriculture resulted in an increasing focus on a limited variety of foods, with meat likely taking a back seat to plants. It is also unlikely that Paleolithic hunter-gatherers were affected by modern diseases of affluence such as type 2 diabetes, coronary heart disease, and cerebrovascular disease, because they ate mostly lean meats and plants and frequently engaged in intense physical activity, and because the average lifespan was shorter than the age of common onset of these conditions. Large-seeded legumes were part of the human diet long before the Neolithic Revolution, as evident from archaeobotanical finds from the Mousterian layers of Kebara Cave, in Israel. There is evidence suggesting that Paleolithic societies were gathering wild cereals for food use at least as early as 30,000 years ago.
Robert E Synovec (born 1959) is an American analytical chemist and professor of chemistry at the University of Washington where he specializes in multidimensional separations and chemometrics. Synovec has received several awards for his contributions to analytical chemistry and separation science, including the GC×GC Scientific Achievement Award and the Marcel E Golay Award, which is given for recognition of a lifetime of achievement in capillary chromatography.
The British, after their Protestant missionaries were unable to win a large audience of native Lebanese Christians, supported and encouraged the Druze and supplied them with money and weapons, as did the French for the Maronites, with most of Britain and France's agents being Orientalists who spent many years in the Levant. The declaration of the Qāʾim Maqāmiyya triggered a wave of violence and further worsened the religious tensions, a series of overlapping and complicated conflicts dominated the years that followed its declaration, with Christian commoners (led by Tanyus Shahin and Youssef Bey Karam) fighting against both Christian and Druze feudal lords and families (Christian feudal lord families include: Khazen family, Abu'l-Lama family and the Shihab family; Druze feudal lord families include: Arslan family, Al Hamdans and Jumblatt family), and bad weather controlling the region in 1856–1858, alongside a crisis in silk production which cut the production of the valuable product in Mount Lebanon to a half, led to several peasant's revolts that ultimately caused the climax of the tensions between the Druze and the Maronites. Subsequently, the Mount Lebanon conflict of 1860 began and led to the demise of the Double Qaim-maqamate.
Sources: en.wikipedia.org
=== Recreational use === The alkaloid has been rising in popularity as a recreational drug known as 7-OH, particularly in the United States. 7-OH-MIT containing tablets are sold in an unregulated manner over the counter in gas stations and smoke shops, with little to no information provided to consumers about the risk of addiction or adverse effects. According to the United States Poison Control Center, the number of cases relating to kratom-based products such as 7-OH-MIT have increased from under 200 in 2014 to 1600 in 2024, with approximately 40% of 7-OH-MIT reports coming from individuals who were abusing the drug.
Brazilian roads are the primary carriers of freight and passenger traffic. The road system totaled 2,000,000 km (1,242,742 mi) in 2023, ranking fourth largest by size globally. The total of paved roads increased from 35,496 km (22,056 mi) in 1967 to 215,000 km (133,595 mi) in 2018. Brazil's railway system has been declining since 1945, when emphasis shifted to highway construction. The country's total railway track length was 30,576 km (18,999 mi) in 2015, as compared with 31,848 km (19,789 mi) in 1970, making it the ninth largest network in the world. Most of the railway system belonged to the Federal Railroad Network Corporation (RFFSA), which was privatized in 2007. The São Paulo Metro began operating on 14 September 1974 as the first underground transit system in Brazil. There are over 4,900 airports and airfields in Brazil, second only to the United States. São Paulo–Guarulhos International Airport, near São Paulo, is the largest and busiest airport with nearly 43 million passengers annually, while handling the vast majority of commercial traffic for the country. For freight transport, waterways are of importance. The industrial zones of Manaus can be reached only by means of the Solimões–Amazonas waterway (3,250 kilometers or 2,020 miles in length, with a minimum depth of six meters or 20 feet). The country also has 50,000 kilometers (31,000 miles) of waterways. Coastal shipping links widely separated parts of the country. Bolivia and Paraguay have been given free ports at Santos.
The team of inventors Edison employed at his laboratories in Menlo Park, New Jersey did, however, develop the first practical light bulb in 1880 (employing a carbonized bamboo filament), shortly prior to Joseph Swan, who invented an even more efficient bulb in 1881 (which used a cellulose filament). Henry Ford did not invent either the automobile or the assembly line. He did improve the assembly line process substantially, sometimes through his own engineering but more often through sponsoring the work of his employees, and he was the main person behind the introduction of the Model T, regarded as the first affordable automobile. Karl Benz (co-founder of Mercedes-Benz) is credited with the invention of the first modern automobile, and the assembly line has existed throughout history. Al Gore never said that he had "invented" the Internet. What Gore actually said was, "During my service in the United States Congress, I took the initiative in creating the Internet", in reference to his political work towards developing the Internet for widespread public use. Gore was the original drafter of the High Performance Computing and Communication Act of 1991, which provided significant funding for supercomputing centers, and this in turn led to upgrades of a major part of the already-existing early 1990s Internet backbone, the NSFNet, and development of NCSA Mosaic, the browser that popularized the World Wide Web.
Sources: en.wikipedia.org
== External links == "FDA Drug Safety Communication: FDA urges caution about withholding opioid addiction medications from patients taking benzodiazepines or CNS depressants: careful medication management can reduce risks". U.S. Food and Drug Administration (FDA). 7 January 2021. Archived from the original on 14 September 2019.
=== Northern Ireland === During a debate with George Galloway in 2005, Hitchens revealed that he was "a lifelong supporter of the reunification of Ireland". Many times, when discussing "the Troubles" in Northern Ireland, Hitchens would refer to their location as simply "Ireland", rather than "Northern Ireland", as for example in an article written for Slate in 2007, discussing the power-sharing and devolved government in Northern Ireland and describing it as "an agreement to divide the spoils of Ireland's six northeastern counties". During the IRA bombing campaigns on Great Britain, which began in the 1970s, Hitchens claimed that he had "kept two sets of books: I didn't like bombs, I didn't like the partition of Ireland."
== Therapeutic touch and nursing education == Sokal, in 2006, reported generally accepted estimates of over 80 colleges and universities spread over 70 countries where therapeutic touch is taught, as well as some 80 hospitals in North America where it is practiced. He added that "these figures should be taken with a grain of salt, since both advocates and detractors [...] have an interest in exaggerating its incidence". Owen Hammer and James Underdown of the Independent Investigations Group examined nursing standards in California, where the California Board of Registered Nursing can award registered nurses taking classes in therapeutic touch with continuing education units required for licensure renewal. In 2006, Hammer and Underdown presented the board with the scientific evidence refuting the validity of therapeutic touch as a legitimate treatment, but the board did not change its policy.
Sources: en.wikipedia.org
No. It is a synthetic analogue modeled on the first 29 residues of human GHRH. The substitutions and any linker are laboratory modifications rather than features of the endogenous peptide.
Early development used the albumin-binding form, and a shorter variant was later discussed under the same label. Because the two differ in half-life and handling, ambiguity arises whenever a source omits the variant designation.
The compound derives from that fragment but is not identical to it. The parent fragment lacks the stabilizing substitutions, so its degradation rate and duration of action differ noticeably.
The version carrying the affinity complex bears a maleimide group that binds serum albumin, which extends its circulation time to several days. The version without it lacks this group and clears within roughly half an hour. The two are chemically related but behave very differently once in the body.