lyophilized powder is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Two forms circulate in research settings and are frequently confused. One carries the drug affinity complex and is often written as CJC-1295 with DAC; the other lacks that group and is usually called modified GRF(1-29). The two share the same core sequence but differ sharply in how long they persist in blood. Products labelled only as CJC-1295 normally refer to the version carrying the complex. Documentation that omits the distinction leaves the intended molecule ambiguous.
CJC-1295 is a synthetic peptide built as a long-acting analogue of growth hormone-releasing hormone. Its backbone matches the first twenty-nine residues of the natural human hormone, with four amino acid substitutions added to slow enzymatic breakdown. A reactive maleimide group, commonly termed the drug affinity complex, allows the peptide to attach to circulating albumin after administration. That albumin attachment keeps the molecule in the bloodstream for an extended period instead of being cleared within minutes.
The compound emerged from work at a Canadian biotechnology firm in the early 2000s. Early human studies examined its effect on growth hormone and insulin-like growth factor 1 in healthy volunteers and in people with HIV-associated fat redistribution. Reports described sustained increases in both markers after a single injection. Development did not advance to regulatory approval, and the clinical programme was later discontinued. The molecule is now encountered mainly as a research chemical rather than a marketed medicine.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C152H252N44O42 | Cited for the form without the drug affinity complex |
| Molecular weight | About 3368 Da | Reported value for modified GRF(1-29) |
| Appearance | White to off-white powder | Lyophilised solid as usually supplied |
| Solubility | Soluble in water and polar solvents | Clarity depends on purity and salt content |
| Typical storage | -20 C or below, dry | Protect from light and repeated warming cycles |
Laboratory handling centers on minimizing exposure to water, heat and oxygen before use. Working solutions are typically prepared in sterile water or a mild buffer, and any residual particulate matter is removed by filtration. When the powder dissolves slowly, a small proportion of acetonitrile or dilute acetic acid is sometimes added as a co-solvent. Containers are kept sealed and desiccated between uses. Records of lot number, reconstitution date and storage conditions support later comparison of results across experiments.
Identity and purity are established with reversed phase high performance liquid chromatography coupled to mass spectrometry. The chromatographic step separates the target peptide from truncated sequences and deletion products, while the mass measurement confirms the expected molecular weight to within a fraction of a dalton. Because the two common variants differ by the presence of the linker, mass alone can distinguish them in the unconjugated state. Amino acid analysis and peptide mapping are used when sequence level confirmation is required.
Lyophilized material is generally stable for extended periods when held at minus twenty degrees Celsius or below and protected from moisture and light. In solution the peptide is more labile; bond hydrolysis, aggregation and oxidation of susceptible residues all proceed faster at ambient temperature. Repeated freeze and thaw cycles should be avoided because they promote clumping and loss of soluble material. The conjugated variant adds a further consideration, since the maleimide group can hydrolyze in aqueous buffer and lose its ability to react with albumin.
CJC-1295 belongs to a family of synthetic peptides modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. The compound is built from the first twenty-nine amino acids of the natural human sequence, a fragment that retains full receptor binding capacity. Native growth hormone-releasing hormone is degraded quickly in circulation, so the fragment alone has limited practical value. Early work therefore focused on chemical modifications that preserve receptor binding while slowing enzymatic breakdown. The result is a molecule described in the literature as a long-acting analog of the natural hormone.
Two forms circulate under the CJC-1295 name, and they differ by a single appended group. The version without a drug affinity complex carries four substitutions along the peptide chain, including a D-alanine near the amino terminus and replacements at three other positions. These changes block the enzyme dipeptidyl peptidase IV and remove a methionine residue that is prone to oxidation. The modified fragment is frequently labeled MOD GRF 1-29. Naming conventions are inconsistent across informal sources, which is a common source of confusion.
== Prosecution == McTavish was tried in 1974 for the murder of an 80-year-old patient, Elizabeth Lyon and assaulting three other patients by giving them illegal injections. One victim was found after tests to have an inexplicable quantity of pethidine in their system, while the murder victim had been injected with soluble insulin. Colleagues of McTavish told the court how they had witnessed her inject a patient with an entirely unnecessary dose of phenobarbitone and then make no record of the injection, and that she had said at the time, "Doctor likes them to go quietly." Multiple doctors testified that McTavish often gave patients injections without recording these events in the patients' case notes. Despite the blood test evidence, McTavish claimed during the 15-day trial that she had only injected the patient with a placebo of sterile water. However, McTavish had admitted in police interviews that she had administered insulin to patients without authorisation. McTavish was jailed for life in October 1974. An appeal in February 1975 was successful. Three appeals court judges said that while there was ample evidence to support the conviction, the McTavish's legal team's successful argument—that the judge, Lord Robertson, had inadvertently misled the jury—would prevail. The appeals judges said Lord Robertson had failed to highlight the fact that McTavish denied admitting to the police that she had committed a mercy killing, an omission that "a few words could have cured." Apart from the case prosecuted, another 23 deaths were deemed suspicious by investigators.
== Medical uses == Isotretinoin is used primarily for persistent cystic acne. Many dermatologists also support its use for treatment of lesser degrees of acne that prove resistant to other treatments, or that produce scarring or psychological distress. Isotretinoin is not indicated for the treatment of prepubertal acne and is not recommended in children less than 12 years of age. It is also somewhat effective for hidradenitis suppurativa and some cases of severe rosacea. It can also be used to help treat harlequin ichthyosis, lamellar ichthyosis and is used in xeroderma pigmentosum cases to relieve keratoses. Isotretinoin has been used to treat the extremely rare condition fibrodysplasia ossificans progressiva. It is also used for the treatment of pediatric neuroblastoma in Japan, but data for its efficacy is not conclusive and it has not been approved in other countries. Isotretinoin therapy has furthermore proven effective against genital warts in experimental use but is rarely used for this indication as there are more effective treatments. Isotretinoin may represent an efficacious and safe alternative systemic form of therapy for recalcitrant condylomata acuminata (RCA) of the cervix. In most countries, this therapy is currently unapproved and only used if other therapies fail.
=== Classification === Stevens–Johnson syndrome (SJS) is a milder form of toxic epidermal necrolysis (TEN). These conditions were first recognized in 1922. A classification first published in 1993, that has been adopted as a consensus definition, identifies Stevens–Johnson syndrome, toxic epidermal necrolysis, and SJS/TEN overlap. All three are part of a spectrum of severe cutaneous reactions (SCAR) which affect skin and mucous membranes. The distinction between SJS, SJS/TEN overlap, and TEN is based on the type of lesions and the amount of the body surface area with blisters and erosions. It is agreed that the most reliable method to classify EM, SJS, and TEN is based on lesion morphology and extent of epidermal detachment. Blisters and erosions cover between 3% and 10% of the body in SJS, 11–30% in SJS/TEN overlap, and over 30% in TEN. The skin pattern most commonly associated with SJS is widespread, often joined or touching (confluent), papuric spots (macules) or flat small blisters or large blisters which may also join. These occur primarily on the torso. SJS, TEN, and SJS/TEN overlap can be mistaken for erythema multiforme. Erythema multiforme, which is also within the SCAR spectrum, differs in clinical pattern and etiology.
=== Lodotra === "Lodotra" is the brand name of an oral formulation, which releases prednisone four hours after ingestion. It is indicated for rheumatoid arthritis with morning stiffness. Taken at 10 p.m., it releases the drug at around 2 a.m. The plasmic peak level is reached at 4 a.m., which is considered to be the optimal time for relieving morning stiffness. The drug was approved in the European Union, in January 2009.
Other companies operating in Turin are Maserati, Lancia, Alfa Romeo, Iveco, Pininfarina, Bertone, Sparco, Italdesign Giugiaro, New Holland, Comau, Magneti Marelli, Graziano Oerlikon, Ghia, Fioravanti (automotive), Rai (national broadcasting company), Banca Investis, FCA Bank, Intesa Sanpaolo, Reale Mutua (finance), Invicta, Kappa, Superga (fashion), Ferrero, Lavazza, Martini & Rossi (food & beverage), Alpitour (hospitality and tourism), TILab (ex-CSELT), and Aurora (pen manufacturer). The city is also well known for its aerospace industry Alenia Aeronautica, Thales Alenia Space and Avio. The International Space Station modules Harmony, Columbus, Tranquility, as well as the Cupola and all MPLMs were produced in Turin. The future European launcher projects beyond Ariane 5 will also be managed from Turin by the new NGL company, a subsidiary of EADS (70%) and Aircraft Division of Leonardo (30%).
Sources: en.wikipedia.org
=== 29 November === Jens Stoltenberg, the Secretary-General of NATO, made a speech at the meeting of NATO foreign ministers at Bucharest, in which he expressed the alliance's commitment to support Ukraine for as long as is required, because allowing Russia to win would only embolden President Vladimir Putin. He also promised Ukraine that NATO would one day accept them as a member and that Putin cannot deny sovereign nations the right to make their own sovereign decisions that were not a threat to Russia. He also speculated that the main challenges to Putin were democracy and freedom.
== Description == Croton lechleri belongs to the family Euphorbiaceae and are medium-sized trees with evergreen foliage, growing 10 to 20 meters (33 to 66 ft) in height. Despite their relatively large height, the trees have very narrow trunks, averaging a bole diameter of about 30 centimeters (0.98 feet). The leaves are large, alternate cordate (heart-shaped), bright green and 15–30 cm in width and length. The flowers are greenish-white, white or amber, which produce small, three-part capsule fruits that appear on a thin spike that measures 30–50 cm. Both the smooth, mottled bark and viscous, red, latex-rich resin excreted from the wounded trunk of the tree are used medicinally.[9] While the sap can be harvested with a tap much like natural latex from rubber trees, trees that are repeatedly tapped become vulnerable to fungal infections. Croton lechleri are native to the Amazon basin and are distributed across the tropical regions of the South American countries of Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela. They are most commonly found in the northwest lowlands between sea level up to 1000 m in elevation, mostly in mineral-rich disturbed soil and along rivers.
== Applications == Bayesian Inference has extensively been used by molecular phylogeneticists for a wide number of applications. Some of these include: Inference of phylogenies. Inference and evaluation of uncertainty of phylogenies. Inference of ancestral character state evolution. Inference of ancestral areas. Molecular dating analysis. Model dynamics of species diversification and extinction Elucidate patterns in pathogens dispersal. Inference of phenotypic trait evolution.
=== Street confrontations === As the hours passed many more people took to the streets. Soon the protesters—unarmed and unorganised—were confronted by soldiers, tanks, APCs, USLA troops (Unitatea Specială pentru Lupta Antiteroristă, anti-terrorist special squads) and armed plainclothes Securitate officers. The crowd was soon being shot at from various buildings, side streets and tanks. There were many casualties, including deaths, as victims were shot, clubbed to death, stabbed and crushed by armoured vehicles. One APC drove into the crowd around the InterContinental Hotel, crushing people. Physician Florin Filipoiu, who took part in the protests at the InterContinental, declared in a 2010 interview that "it was only an illusion that the Army was on the revolutionaries' side." A French journalist, Jean-Louis Calderon, was killed. A street near University Square was later named after him, as well as a high school in Timișoara. Belgian journalist Danny Huwé was shot and killed on 23 or 24 December 1989.
Glucose is produced industrially from starch by enzymatic hydrolysis using glucose amylase or by the use of acids. Enzymatic hydrolysis has largely displaced acid-catalyzed hydrolysis reactions. The result is glucose syrup (enzymatically with more than 90% glucose in the dry matter) with an annual worldwide production volume of 20 million tonnes (as of 2011). This is the reason for the former common name "starch sugar". The amylases most often come from Bacillus licheniformis or Bacillus subtilis (strain MN-385), which are more thermostable than the originally used enzymes. Starting in 1982, pullulanases from Aspergillus niger were used in the production of glucose syrup to convert amylopectin to starch (amylose), thereby increasing the yield of glucose. The reaction is carried out at a pH = 4.6–5.2 and a temperature of 55–60 °C. Corn syrup has between 20% and 95% glucose in the dry matter. The Japanese form of the glucose syrup, Mizuame, is made from sweet potato or rice starch. Many crops can be used as the source of starch. Maize, rice, wheat, cassava, potato, barley, sweet potato, corn husk and sago are all used in various parts of the world. In the United States, corn starch (from maize) is used almost exclusively. Some commercial glucose occurs as a component of invert sugar, a roughly 1:1 mixture of glucose and fructose that is produced from sucrose. In principle, cellulose could be hydrolyzed to glucose, but this process is not yet commercially practical.
Sources: en.wikipedia.org
== Epidemiology == In the United States, approximately 550,000 people die each year from heart-related arterial embolism and thrombosis. Approximately 250,000 of these individuals are female, and approximately 100,000 of all these deaths are considered premature, that is, prior to the age of average life expectancy.
February 6: Law modifying the rules for legal separation. July 15: Law on free medical assistance for people without means: women giving birth are considered equivalent to sick persons. August 19: A law concerning fire safety measures in certain regions of France holds the husband civilly liable for offenses and violations committed by his wife. July 20, 1895: Law on savings banks. December 7, 1897: Law granting women the right to be witnesses in civil status acts and in official documents in general. 1898
=== 3. Cementum === Cementum is a thin, calcified, avascular connective tissue that covers the root surface of the tooth. Its primary function is to serve as an attachment medium for periodontal ligament collagen fibers, thereby securing the tooth within the alveolar socket. Under normal conditions, cementum is located subgingivally and is not exposed to the oral environment. However, gingival recession associated with periodontal disease may expose cementum, increasing the risk of dentinal hypersensitivity and root caries.
=== True cobras === The cobras (Naja spp.) are a medically important group of snakes due to the number of bites and fatalities they cause across their geographical range. The genus Naja consists of 20 to 22 species, but has undergone several taxonomic revisions in recent years, so sources vary greatly. They range throughout Africa (including some parts of the Sahara where Naja haje can be found), Southwest Asia, Central Asia, South Asia, East Asia, and Southeast Asia. The most recent revision, listed 28 species after the synonymisation of Boulengerina and Paranaja with Naja. But unlike some other members of the family Elapidae (the species of the genus Bungarus, genus Oxyuranus, genus Pseudohaje, and especially genus Dendroaspis), half of the bites by many species of both African and Asian origin of the genus Naja are "dry bites" (a dry bite is a bite by a venomous snake in which no venom is released). Roughly 45–50% of bites by most cobra species are dry bites and thus don't cause envenomation. Some of the species that are known and documented to deliver dry bites in a majority of cases include Naja naja, Naja kaouthia, Naja sputatrix, Naja siamensis, Naja haje, Naja annulifera, Naja anchietae, and Naja nigricollis. Some species will inject venom in the majority of their bites, but still deliver high number of dry bites (40–45%) include: Naja sumatrana, Naja melanoleuca, Naja atra, Naja mossambica and Naja katiensis. Within this genus, there are a few species in which dry bites are very rare. Envenoming occurs in at least 75–80% of bite cases involving these species.
The new 25th district runs from northern Arlington and southern and eastern Fort Worth in Tarrant County, whose portion is the only portion of the district considered even remotely competitive (and in fact, favorable) to Democrats, out to several heavily Republican exurban and rural areas south and west of Fort Worth and just east of Abilene, including Cleburne, Granbury, Willow Park, Mineral Wells, Stephenville, Jacksboro and Eastland. Due to redistricting, the district has two incumbents, Republican Roger Williams, who was re-elected unopposed in 2024, and Democrat Marc Veasey, who was re-elected with 68.7% of the vote in 2024. Veasey, the incumbent from the old 33rd district (see below) decided to not seek reelection, instead pursuing a short-lived bid for Tarrant County judge before dropping out of that race. Donald Trump won 61.4% of the vote in this district in 2024, which also saw Ted Cruz win 58.4% of the vote.
Sources: en.wikipedia.org
It is a synthetic peptide analogue of growth hormone-releasing hormone. Four substitutions in its sequence make it more resistant to enzymatic degradation than the natural hormone. In the version carrying a drug affinity complex, the peptide binds albumin and remains in circulation for days.
No regulatory agency has approved CJC-1295 for clinical use. Human trials were conducted in the 2000s, but the development programme was discontinued before any marketing application succeeded. Material sold today is offered as a research chemical, and its purity depends on the supplier.
Sermorelin is an unmodified fragment of growth hormone-releasing hormone and is cleared quickly. CJC-1295 contains substitutions that resist breakdown, and the form with a drug affinity complex persists much longer. Both act at the same receptor but differ substantially in duration of action.
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.