Everything below concerns lyophilisation. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-10-22. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
Lyophilised powder is the usual supplied form. The material is hygroscopic, so vials are typically equilibrated to room temperature before opening in order to prevent condensation on the contents. Long-term storage is generally described at minus twenty degrees Celsius or colder, protected from light and moisture. Repeated freeze-thaw cycles are avoided because they promote aggregation and loss of soluble material. A reconstituted solution is considerably less stable than the dry powder and is normally kept refrigerated for short periods only.
Identity and purity are assessed mainly by reversed-phase high-performance liquid chromatography combined with mass spectrometry. The chromatographic separation resolves the target peptide from truncation products and from species carrying oxidised residues, while mass measurement confirms the expected molecular mass. Because the two common variants differ by roughly 280 daltons, a mass determination distinguishes them unambiguously. Purity is often quoted as a percentage of total peak area, although that figure depends on the detection wavelength and the integration method applied.
| 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 |
CJC-1295 is a synthetic analogue of growth hormone-releasing hormone, built on the 29-amino-acid GHRH(1-29) fragment. Four substitutions distinguish it from the natural sequence: D-alanine at position 2, glutamine at position 8, alanine at position 15, and leucine at position 27. These changes reduce enzymatic cleavage and extend the peptide's persistence in circulation. The compound is discussed in two forms, one carrying a drug affinity complex and one without it.
The drug affinity complex is a maleimidopropionic acid group attached to a lysine side chain. It reacts with the free thiol of cysteine-34 on circulating albumin, forming a covalent bond. This conjugation keeps the peptide in the bloodstream and shields it from rapid renal filtration and proteolysis. Reported circulation half-lives for the albumin-bound form fall in the range of roughly six to nine days in early human studies.
CJC-1295 is a synthetic peptide belonging to the growth hormone-releasing hormone analog family. It comprises twenty-nine amino acid residues derived from the N-terminal region of natural GHRH. The molecule incorporates several non-natural substitutions that increase resistance to enzymatic degradation. These modifications extend its activity compared with the native hormone fragment. Researchers use it to study pituitary growth hormone secretion in laboratory and clinical settings. This compound is distinct from native GHRH in its stability profile.
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.
The attached maleimide group explains the unusual duration of the DAC version. After injection it reacts with the thiol of cysteine-34 on serum albumin, forming a stable covalent bond. The resulting conjugate is too large for rapid kidney filtration and is shielded from many peptidases. Reported half-lives for this form reach several days, whereas the version without the group is cleared in roughly half an hour. That gap is the main pharmacological difference between the two.
Downstream of growth hormone, the liver and other tissues increase production of insulin-like growth factor 1, a mediator of many growth-promoting effects. Studies have documented elevated levels of both hormones after dosing, and the rise from the long-acting form persists longer than that produced by shorter-acting analogues. What remains unclear is whether sustained elevation of these markers translates into meaningful clinical benefit, and whether prolonged exposure carries risks that short trials could not detect.
== See also == Fire syringe has two meanings: A fire piston, a fire starting device A squirt, in the form of a large syringe, one of the first firefighting devices in history used to squirt water onto the burning fuel. Autoinjector, a device to ease injection, e.g. by the patient or other untrained personnel. Hippy Sippy Jet injector, injects without a needle, by squirting the injection fluid so fast that it makes a hole in the skin. Luer taper, a standardized fitting system used for making leak-free connections between syringe tips and needles. Needle exchange programme, is a social policy based on the philosophy of harm reduction where injecting drug users (IDUs) can obtain hypodermic needles and associated injection equipment at little or no cost. Safety syringe, with features to prevent accidental needlesticks and reuse Syrette, similar to a syringe except that it has a closed flexible tube (like that used for toothpaste) instead of a rigid tube and piston. Syringing the ear to remove excess ear wax. Syrinx, the nymph from classical mythology after which syringes were supposedly named. Trypanophobia, a fairly common extreme fear of hypodermic syringes Vaginal syringe
=== Plant === In vivo, plant PPOs are expressed as about 64–68 kDa proteins consisting of three domains: a chloroplastic transit peptide (containing a ~4-9 kDa thylakoid signal peptide), a catalytically active domain (~ 37–42 kDa) containing the dinuclear copper center, and a C-terminal domain (~15–19 kDa) shielding the active site.
Communist ideologies and ideas have acquired a new meaning since the Russian Revolution, as they became equivalent to the ideas of Marxism–Leninism, namely the interpretation of Marxism by Vladimir Lenin and his successors. Endorsing the final objective, namely the creation of a community-owning means of production and providing each of its participants with consumption "according to their needs", Marxism–Leninism puts forward the recognition of the class struggle as a dominating principle of a social change and development. In addition, workers (the proletariat) were to carry out the mission of reconstruction of the society. Conducting a socialist revolution led by what its proponents termed the "vanguard of the proletariat", defined as the communist party organised hierarchically through democratic centralism, was hailed to be a historical necessity by Marxist–Leninists. Moreover, the introduction of the proletarian dictatorship was advocated and classes deemed hostile were to be repressed. In the 1920s, it was first defined and formulated by Joseph Stalin based on his understanding of orthodox Marxism and Leninism. In 1934, Karl Radek suggested the formulation Marxism–Leninism–Stalinism in an article in Pravda to stress the importance of Stalin's leadership to the Marxist–Leninist ideology. Radek's suggestion failed to catch on, as Stalin as well as CPSU's ideologists preferred to continue the usage of Marxism–Leninism.
Sources: en.wikipedia.org
Nature Communications, 6, 7564. https://doi.org/10.1038/ncomms8564 J. Su, P. Wang, W. Zhou, M. Peydayesh, J. Zhou, T. Jin, F. Donat, C. Jin, L. Xia, K. Wang, F. Ren, P. Van der Meeren, F. Pelayo García de Arquer & R. Mezzenga (2024). Single-site iron-anchored amyloid hydrogels as catalytic platforms for alcohol detoxification. Nature Nanotechnology, 19(8), 1168–1177. https://doi.org/10.1038/s41565-024-01657-7 J. Zhou, S. Gowachirapant, C. Zeder, A. Wieczorek, J. Guth, I. Kutzli, S. Siol, F. von Meyenn, M. B. Zimmermann & R. Mezzenga (2025). Oat protein nanofibril–iron hybrids offer a stable, high-absorption iron delivery platform for iron fortification. Nature Food, 6, 1164–1175. https://doi.org/10.1038/s43016-025-01260-6 J. Adamcik & R. Mezzenga (2018). Amyloid polymorphism in the protein folding and aggregation energy landscape. Angewandte Chemie International Edition, 57(28), 8370–8382. https://doi.org/10.1002/anie.201713416 D. Xu, J. Zhou, W.L. Soon, I. Kutzli, A. Molière, S. Diedrich, M. Radiom, S. Handschin, B. Li, L. Li, S. J. Sturla, C. Y. Ewald, R. Mezzenga (2023). Food amyloid fibrils are safe nutrition ingredients based on in-vitro and in-vivo assessment. Nature Communications, 14(1), 6806. https://doi.org/10.1038/s41467-023-42486-x
Glucagon serves as a signal to the liver to break down glycogen and release glucose into the blood. Glucokinase in beta cells serves as a glucose sensor, amplifying insulin secretion as blood glucose rises. In the pancreatic beta-cell, glucokinase is a key regulator enzyme. Glucokinase is very important in the regulation of insulin secretion and has been known as the pancreatic beta-cell sensor. Mutations in the gene encoding glucokinase can cause both hyperglycemia and hypoglycemia because of its central role in the regulation of insulin release. Glucose-sensitive neurons of the hypothalamus In response to rising or falling levels of glucose, cells in the hypothalamus polarize or depolarize. Among the neuroendocrine reactions of the central nervous system to hypoglycemia is activation of the adrenergic responses of the autonomic nervous system. Glucokinase likely serves as a glucose signal here as well. Glucokinase has also been found in cells of the anterior pituitary. Enterocytes of the small intestine This is the least-understood of the glucokinase sensor systems. It seems likely that responses to incoming glucose during digestion play a role in the incretin amplification of insulin secretion during a meal, or in the generation of satiety signals from gut to brain.
== Championships and accomplishments == Konfrontacja Sztuk Walki Knockout of the Night (Two times) vs. Rolles Gracie Jr. and Michał Materla Most wins in Konfrontacja Sztuk Walki heavyweight history (17). Most knockouts in Konfrontacja Sztuk Walki heavyweight history (12). Most knockouts in Konfrontacja Sztuk Walki history (12). Most consecutive knockouts in Konfrontacja Sztuk Walki history (5). Third most wins in Konfrontacja Sztuk Walki history (17). Third most fights in Konfrontacja Sztuk Walki history (24). World MMA Awards 2021 Upset of the Year - Nominee
Sources: en.wikipedia.org
Scarborough is represented by six ridings for the provincial government and Federal government. Municipal riding boundaries were harmonized within the City of Toronto to match the provincial boundaries in 1999 through provincial legislation called The Fewer Municipal Politicians Act of 1999. This took effect on December 1, 2000. Ridings were represented by two councillors per riding until 2018 when the Government of Ontario reduced this to one councillor per riding. Scarborough now has six councillors.
Compounds of vitamin B6 contain a pyridine ring. The actual active compound is pyridoxal phosphate. However, pyridoxal as well as pyridoxine, pyridoxamine, and their phosphates can readily be converted into pyridoxal phosphate. Consequently, all six compounds are assigned to the vitamin B6 group. In humans, pyridoxal phosphate acts as a cofactor in a very large number of biological processes, including approximately 140 known enzymatic reactions. About 4% of all cellular enzymes require pyridoxal phosphate as a cofactor. Vitamin B6 must be obtained from the diet and is found in substantial amounts in both animal and plant foods. Animal sources include fish, liver, and other offal. Plant sources include potatoes, nuts, avocados, and bananas. In plant foods, the vitamin B6 precursor pyridoxine-5'-glucoside predominates. The principal function of pyridoxal phosphate in these reactions is the stabilization of negative charges in amino compounds. Such reactions include transaminations, decarboxylations, as well as various substitution reactions and elimination reactions. Nicotinamide adenine dinucleotide (NAD) is likewise a cofactor and is essential for many redox reactions in biological systems. These include the degradation of glucose to pyruvic acid during glycolysis. NAD is also required for the citrate cycle. In addition, it acts as a regulator of transcription factors, for example in the circadian rhythm.
Rodney local council would lose Orewa, Dairy Flat, and Whangaparaoa but retain the remainder of the current Rodney District. The split areas as well as the current North Shore City would form a Waitemata local council. Waitakere local council would consist of the current Waitakere City as well as the Avondale area. Tamaki Makaurau would consist of the current Auckland City and Otahuhu (excluding CBD) Manukau local council would consist of the urban parts of the current Manukau City and of the Papakura District. Hunua local council would consist of the entire Franklin District, much of which is currently in the Waikato Region, along with rural areas of the current Papakura District and Manukau City. The entire Papakura District would be dissolved between urban and rural councils. The National-led Government responded within about a week. Its plan, which went to a Select Committee, accepted the proposal for supercity and many community boards, but rejected proposals for local councils and, initially, no separate seats for Māori. Public reaction to the Royal Commission report was mixed, especially in regards to the Government's amended proposal. Auckland Mayor John Banks supported the amended merger plans. Criticism of the amended proposal came largely from residents in Manukau, Waitakere and North Shore Cities. In addition, Māori Affairs Minister Pita Sharples spoke against the exclusion of the Māori seats, as recommended by the Royal Commission. Opposition Leader Phil Goff called for a referendum on the issue.
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.
Chromatography reports how much material elutes as a single peak but does not confirm what that material is. Mass spectrometry supplies the molecular mass, which is characteristic of a given sequence and its modifications. Together the two methods support both a purity figure and an identity claim.