Everything below concerns drug affinity complex. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
Analytical confirmation usually relies on reversed-phase high-performance liquid chromatography for purity and on liquid chromatography coupled to mass spectrometry for identity. Mass data reveal the expected molecular mass and can flag truncated or oxidized species. Amino acid analysis and peptide mapping provide sequence-level verification. Immunoassays are used in some biological matrices, but antibodies raised against one releasing-hormone analog may cross-react with another. Reported purity figures depend heavily on the method used, so comparisons between suppliers require matching the analytical approach.
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.
| 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 |
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.
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.
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.
Verification matters because research peptides vary widely in quality. A certificate of analysis is only as reliable as the method behind it, and a single chromatographic trace reveals little about counter-ions, residual solvents, or water content. Independent laboratories commonly pair mass confirmation with chromatographic purity and, where relevant, quantify water along with acetate or trifluoroacetate content. Reported purity figures are not standardized across suppliers, so a stated value such as ninety-eight percent is not directly comparable unless the analytical method, column, and detection wavelength accompany it.
== History == Captopril, the first ACE inhibitor, is a functional and structural analog of a peptide derived from the venom of the jararaca, a Brazilian pit viper (Bothrops jararaca). Enalapril is a derivative, designed by scientists at Merck to overcome the rash and bad taste caused by captopril. Enalapril is actually a prodrug; the active metabolite is enalaprilat. The di-acid metabolite of enalapril, enalaprilat, and its lysine analogue lisinopril are potent inhibitors of angiotensin-converting enzyme (ACE); they do not contain sulphydryl groups. Both drugs can be assayed by high-pressure liquid chromatography and by radioimmunoassay and plasma ACE inhibition remains stable under normal storage conditions. It is therefore possible to study their pharmacokinetics as well as their pharmacodynamic effects in humans. Enalaprilat and lisinopril as well as ACE activity have been measured in blood taken during the course of two studies of the effects of these drugs on blood pressure and autonomic responsiveness. Lisinopril is a synthetic peptide derivative of captopril. Scientists at Merck created lisinopril by systematically altering each structural unit of enalaprilat, substituting various amino acids. Adding lysine at one end of the drug turned out to have strong activity and adequate bioavailability when given orally; analogs of that compound resulted in lisinopril, which takes its name from the discovery of lysine. Merck conducted clinical trials, and the drug was approved for hypertension in 1987 and congestive heart failure in 1993.
=== Distribution === The drug is distributed rapidly and widely to most tissues and fluids, including sputum, pleural fluid, peritoneal fluid, interstitial fluid, bile, aqueous humor, reproductive organs, and bone; highest concentrations occur in pleural fluid, interstitial fluid, peritoneal fluid, and reproductive organs; low concentrations occur in CSF; it crosses the placenta, and enters breast milk
==== Korea ==== The earliest soy sauce brewing in Korea seems to have begun in the era of the Three Kingdoms. Jangdoks used for soy sauce brewing are found in the mural paintings of Anak Tomb No. 3 from the 4th century Goguryeo. In Samguk sagi, a historical record of the Three Kingdoms era, it is written that ganjang (soy sauce) and doenjang (soybean paste), along with meju (soybean block) and jeotgal (salted seafood), were prepared for the wedding ceremony of the King Sinmun in February 683. Sikhwaji, a section from Goryeosa (History of Goryeo), recorded that ganjang and doenjang were included in the relief supplies in 1018, after a Khitan invasion, and in 1052, when a famine occurred. Joseon texts such as Guhwangchwaryo and Jeungbo sallim gyeongje contain the detailed procedures on how to brew good quality ganjang and doenjang. Gyuhap chongseo explains how to pick a date for brewing, what to forbear, and how to keep and preserve ganjang and doenjang.
=== Other arts === Opus (film), 2025, starring John Malkovich Opus (play), 2006, by Michael Hollinger Opus: The Day We Found Earth, a 2015 video game Opus: Rocket of Whispers, a 2017 sequel Opus: Echo of Starsong, a 2021 sequel Work of art (L. opus) Magnum opus or masterwork
Sources: en.wikipedia.org
Banting's namesake, the Banting Research Foundation, was created in 1925 and provides funding to support health and biomedical research in Canada. Banting's name is immortalized in the yearly Banting Lectures, given by an expert in diabetes, and by the creation of the Banting and Best Department of Medical Research of the University of Toronto; Sir Frederick G Banting Research Centre located on Sir Frederick Banting Driveway in the Tunney's Pasture complex, Ottawa; Banting Memorial High School in Alliston Sir Frederick Banting Secondary School in London, Ontario; Sir Frederick Banting Alternative Program Site in Ottawa; Frederick Banting Elementary School in Montréal-Nord and École Banting Middle School in Coquitlam. The "Major Sir Frederick Banting, MC, RCAMC Award for Military Health Research", sponsored by the True Patriot Love Foundation, is awarded annually by the Surgeon General to the researcher whose work presented at the annual Military and Veterans Health Research Forum is deemed to contribute most to military health. It was first awarded in 2011 in the presence of several Banting descendants. The "Canadian Forces Major Sir Frederick Banting Term Chair in Military Trauma Research" at Sunnybrook Health Sciences Centre was established in 2012. The first Chair holder is Colonel Homer Tien, medical director of Sunnybrook's Tory Regional Trauma Centre and Senior Specialist and Trauma Adviser to the Surgeon General.
The two copper atoms within the active site of tyrosinase enzymes interact with molecular oxygen to form a highly reactive chemical intermediate that then oxidizes the substrate. The activity of tyrosinase is similar to catechol oxidase, a related class of copper oxidase. Tyrosinases and catechol oxidases are collectively termed polyphenol oxidases.
In that time, Stalin's centralised socialism in one country régime had negatively associated Lenin's revolutionary Bolshevism with Stalinism, i.e. government by command-policy to realise projects such as the rapid industrialisation of cities and the collectivisation of agriculture. Such Stalinism also subordinated the interests (political, national and ideological) of Asian and European communist parties to the geopolitical interests of the Soviet Union. In the 1928–1932 period of the first five-year plan, Stalin effected the dekulakisation of the farmlands of the Soviet Union, a politically radical dispossession of the kulak class of peasant-landlords from the Tsarist social order of monarchy. As Old Bolshevik revolutionaries, Bukharin, Rykov and Tomsky recommended amelioration of the dekulakisation to lessen the negative social impact in the relations between the Soviet peoples and the party, but Stalin took umbrage and then accused them of uncommunist philosophical deviations from Lenin and Marx. That implicit accusation of ideological deviationism licensed Stalin to accuse Bukharin, Rykov and Tomsky of plotting against the party and the appearance of impropriety then compelled the resignations of the Old Bolsheviks from government and from the Politburo. Stalin then completed his political purging of the party by exiling Trotsky from the Soviet Union in 1929. Afterwards, the political opposition to the practical régime of Stalinism was denounced as Trotskyism (Bolshevik–Leninism), described as a deviation from Marxism–Leninism, the state ideology of the Soviet Union.
This steroid hormone acts on the epithelial cells of the upper small intestine, increasing their capacity to absorb calcium from the gut contents into the blood. The second homeostatic mechanism, with its sensors in the thyroid gland, releases calcitonin into the blood when the blood ionized calcium rises. This hormone acts primarily on bone, causing the rapid removal of calcium from the blood and depositing it, in insoluble form, in the bones. The two homeostatic mechanisms working through PTH on the one hand, and calcitonin on the other can very rapidly correct any impending error in the plasma ionized calcium level by either removing calcium from the blood and depositing it in the skeleton, or by removing calcium from it. The skeleton acts as an extremely large calcium store (about 1 kg) compared with the plasma calcium store (about 180 mg). Longer term regulation occurs through calcium absorption or loss from the gut. Another example are the most well-characterised endocannabinoids like anandamide (N-arachidonoylethanolamide; AEA) and 2-arachidonoylglycerol (2-AG), whose synthesis occurs through the action of a series of intracellular enzymes activated in response to a rise in intracellular calcium levels to introduce homeostasis and prevention of tumor development through putative protective mechanisms that prevent cell growth and migration by activation of CB1 and/or CB2 and adjoining receptors.
The first large, diverse lineage of short-tailed avialans to evolve were the Enantiornithes, or "opposite birds", so named because the construction of their shoulder bones was in reverse to that of modern birds. Enantiornithes occupied a wide array of ecological niches, from sand-probing shorebirds and fish-eaters to tree-dwelling forms and seed-eaters. While they were the dominant group of avialans during the Cretaceous period, Enantiornithes became extinct along with many other dinosaur groups at the end of the Mesozoic era. Many species of the second major avialan lineage to diversify, the Euornithes (meaning "true birds", because they include the ancestors of modern birds), were semi-aquatic and specialised in eating fish and other small aquatic organisms. Unlike the Enantiornithes, which dominated land-based and arboreal habitats, most early euornithians lacked perching adaptations and likely included shorebird-like species, waders, and swimming and diving species. The latter included the superficially gull-like Ichthyornis and the Hesperornithiformes, which became so well adapted to hunting fish in marine environments that they lost the ability to fly and became primarily aquatic. The early euornithians also saw the development of many traits associated with modern birds, like strongly keeled breastbones, toothless, beaked portions of their jaws (though most non-avian euornithians retained teeth in other parts of the jaws).
Sources: en.wikipedia.org
archaeological samples containing partially degraded DNA, see ancient DNA samples containing inhibitors of subsequent analysis procedures, most notably inhibitors of PCR, such as humic acid from the soil, indigo and other fabric dyes or haemoglobin in blood samples from microorganisms with thick cellular walls, for example, yeast samples containing mixed DNA from multiple sources Extrachromosomal DNA is generally easy to isolate, especially plasmids may be easily isolated by cell lysis followed by precipitation of proteins, which traps chromosomal DNA in insoluble fraction and after centrifugation, plasmid DNA can be purified from soluble fraction. A Hirt DNA Extraction is an isolation of all extrachromosomal DNA in a mammalian cell. The Hirt extraction process gets rid of the high molecular weight nuclear DNA, leaving only low molecular weight mitochondrial DNA and any viral episomes present in the cell.
== Notable people == Salvatore Baccaro (1932–1984), Italian character actor. Active in B-movies, comedies, and horrors because of his peculiar features and spontaneous sympathy. Paul Benedict (1938–2008), American actor. Best known for portraying Harry Bentley, The Jeffersons' English next door neighbor Mary Ann Bevan (1874–1933), an English woman, who after developing acromegaly, toured the sideshow circuit as "the ugliest woman in the world". Eddie Carmel, born Oded Ha-Carmeili (1936–1972), Mandatory Palestine-born entertainer with gigantism and acromegaly, popularly known as "The Jewish Giant". Rondo Hatton (1894–1946), American journalist and actor. A Hollywood favorite in B-movie horror films of the 1930s and 1940s. Hatton's disfigurement, due to acromegaly, developed over time, beginning during his service in World War I. Irwin Keyes (1952–2015), American actor. Best known for portraying Hugo Mojoloweski, George's occasional bodyguard on The Jeffersons Richard Kiel (1939–2014), actor, "Jaws" from two James Bond movies and Mr. Larson in Happy Gilmore Sultan Kösen, the world's tallest living man. Neil McCarthy (1932–1985), British actor. Known for roles in Zulu, Time Bandits, and many British television series The Great Khali (Dalip Singh Rana), Indian professional wrestler, is best known for his tenure with WWE under the ring name The Great Khali. He had his pituitary tumor removed in 2012 at age 39. André the Giant (André Roussimoff, 1946–1993), French professional wrestler and actor, known for playing Fezzik in The Princess Bride.
For use topically on the skin, eye, and mucous membranes. Topical corticosteroids are divided in potency classes I to IV in most countries (A to D in Japan). Seven categories are used in the United States to determine the level of potency of any given topical corticosteroid.
== Neuroendocrine tumors (209–209) == 209 Neuroendocrine tumors 209.0 Malignant carcinoid tumors of the small intestine 209.1 Malignant carcinoid tumors of the appendix, large intestine, and rectum 209.2 Malignant carcinoid tumors of other and unspecified sites 209.3 Malignant poorly differentiated neuroendocrine carcinoma 209.4 Benign carcinoid tumors of the small intestine 209.5 Benign carcinoid tumors of the appendix, large intestine, and rectum 209.6 Benign carcinoid tumors of other and unspecified sites
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.