CJC-1295 comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2025-10-25. Numbers and descriptions here follow the published literature rather than marketing material.
Purity is most often assessed by reversed-phase high-performance liquid chromatography, reported as a percentage of total peak area. Identity is confirmed by mass spectrometry, which yields a molecular ion consistent with the expected sequence. Amino acid analysis and peptide mapping provide additional characterization. Reported purity values are method-dependent, so figures from different laboratories are not always directly comparable without details of column, gradient, and detection wavelength.
Peptide degradation proceeds mainly through hydrolysis, oxidation of methionine, and deamidation of asparagine or glutamine residues. The maleimide group on the albumin-binding variant can also react with thiols or hydrolyze in aqueous media. Because these pathways accelerate with temperature and pH extremes, handling conditions strongly influence measured stability. Stability data in the public literature are limited and often generated under differing conditions, so general statements about shelf life should be read as approximate.
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.
The peptide backbone corresponds to GRF(1-29), the first 29 residues of native growth hormone-releasing hormone, which retains most of the receptor-activating activity of the full-length molecule. Four substitutions distinguish the analog from the natural sequence: D-alanine at position 2, glutamine at position 8, alanine at position 15, and leucine at position 27. These changes slow cleavage by dipeptidyl peptidase IV, the enzyme that degrades native hormone in plasma within minutes. The outcome is improved enzymatic stability combined with a still brief residence time when no additional modification is present.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white lyophilized powder | Visual descriptor; not a measure of purity |
| Solubility class | Freely soluble in water | Aqueous dissolution may require gentle mixing |
| Typical storage (powder) | −20 °C or below, desiccated | Protect from light and ambient moisture |
| Typical storage (solution) | 2–8 °C, short term | Freeze aliquots where longer holding is needed |
| Purity assessment | Reversed-phase HPLC, area percent | Values depend on column, gradient, and detection wavelength |
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.
Four amino acid substitutions separate the modified backbone from the parent GRF(1-29) sequence. These changes reduce recognition by dipeptidyl peptidase IV and related proteases, extending the interval before degradation. Development work in this area sought longer-acting GHRH analogs for endocrine investigation. Published descriptions treat the substitution set as a defining property of the core sequence, while the albumin-binding linker is described separately as an optional addition to that same backbone.
CJC-1295 is a synthetic peptide analog of growth hormone-releasing hormone, constructed on the 29-amino-acid fragment designated GRF(1-29). The name began as an internal development code during the 1990s and later spread through research supply catalogs and discussion forums. The molecule does not occur in nature; its sequence is engineered rather than isolated from tissue. Two related compounds are sold under this single label, and they differ by one appended chemical group that strongly influences how long the peptide remains in circulation.
The dividing feature between the two forms is a maleimide-based drug affinity complex, abbreviated DAC. In the DAC-bearing version, a linker attaches the peptide to serum albumin after administration, and that association slows removal from plasma. The version lacking DAC appears in catalogs as MOD GRF(1-29) or tetrasubstituted GRF(1-29). Because informal writing treats both as one item, comparisons drawn from such sources routinely blend measurements taken from two molecules with substantially different behavior.
There are two broad main traditions in cider production in the UK: the West Country tradition and the eastern Kent and East Anglia tradition. The former are made using a much higher percentage of true cider apples and so are richer in tannins and sharper in flavour. Kent and East Anglia ciders tend to use a higher percentage of or are exclusively made from, culinary and dessert fruit; they tend to be clearer, more vinous and lighter in body and flavour. At one end of the scale are the traditional, small farm-produced varieties. These are non-carbonated and usually cloudy orange in appearance. Britain's West Country contains many of these farms which have an abundance of ancient varieties of specialist cider-apples. Production is often on such a small scale, the product being sold only at the site of manufacture or in local pubs and shops. At the other end of the scale are the factories mass-producing brands such as Strongbow and Blackthorn. Mass-produced cider, such as that produced by Bulmers, is likely to be pasteurised and force-carbonated. The colour is likely to be golden yellow with a clear appearance from the filtration. White ciders are almost colourless in appearance and only need contain 25% apple.
== Research == Bicalutamide has been studied in combination with the 5α-reductase inhibitors finasteride and dutasteride in prostate cancer. It has also been studied in combination with raloxifene, a selective estrogen receptor modulator (SERM), for the treatment of prostate cancer. Bicalutamide has been tested for the treatment of AR-positive ER/PR-negative locally advanced and metastatic breast cancer in women in a phase II study for this indication. Enzalutamide is also being investigated for this type of cancer. Bicalutamide has also been studied in a phase II clinical trial for ovarian cancer in women. Bicalutamide has been studied in the treatment of benign prostatic hyperplasia (BPH) in a 24-week trial of 15 patients at a dosage of 50 mg/day. Prostate volume decreased by 26% in patients taking bicalutamide and urinary irritative symptom scores significantly decreased. Conversely, peak urine flow rates and urine pressure flow examinations were not significantly different between bicalutamide and placebo. The decrease in prostate volume achieved with bicalutamide was comparable to that observed with the 5α-reductase inhibitor finasteride, which is approved for the treatment of BPH. Breast tenderness (93%), gynecomastia (54%), and sexual dysfunction (60%) were all reported as side effects of bicalutamide at the dosage used in the study, although no treatment discontinuations due to adverse effects occurred and sexual functioning was maintained in 75% of patients.
Motif discovery happens in three major phases. A pre-processing stage where sequences are meticulously prepared in assembly and cleaning steps. Assembly involves selecting sequences that contain the desired motif in large quantities, and extraction of unwanted sequences using clustering. Cleaning then ensures the removal of any confounding elements. Next there is the discovery stage. In this phase sequences are represented using consensus strings or Position-specific Weight Matrices (PWM). After motif representation, an objective function is chosen and a suitable search algorithm is applied to uncover the motifs. Finally the post-processing stage involves evaluating the discovered motifs.
Sources: en.wikipedia.org
== Analytical methods == Several HPLC-UV methods have been reported for valdecoxib estimation in biological samples like human urine. Valdecoxib has analytical methods for bioequivalence studies, metabolite determination, estimation of formulation, and an HPTLC method for simultaneous estimation in tablet dosage form.
=== Alternative concepts === During their research, Eigen and Schuster also considered types of protein and nucleotide coupling other than hypercycles. One such alternative was a model with one replicase that performed polymerase functionality and that was a translational product of one of the RNA matrices existing among the quasispecies. This RNA-dependent RNA polymerase catalysed the replication of sequences that had specific motifs recognized by this replicase. The other RNA matrices, or just one of their strands, provided translational products which had specific anticodons and were responsible for unique assignment and transportation of amino acids. Another concept devised by Eigen and Schuster was a model in which each RNA template's replication was catalysed by its own translational product; at the same time, this RNA template performed a transport function for one amino acid type. Existence of more than one such RNA template could make translation possible. Nevertheless, in both alternative concepts, the system will not survive due to the internal competition among its constituents. Even if none of the constituents of such a system is selectively favoured, which potentially allows coexistence of all of the coupled molecules, they are not able to coevolve and optimize their properties. In consequence, the system loses its internal stability and cannot live on. The reason for inability to survive is the lack of mutual control of constituent abundances.
The upper part of trachea receives and drains blood through the inferior thyroid arteries and veins; the lower trachea receives blood from bronchial arteries. Arteries that supply the trachea do so via small branches that supply the trachea from the sides. As the branches approach the wall of the trachea, they split into inferior and superior branches, which join with the branches of the arteries above and below; these then split into branches that supply the anterior and posterior parts of the trachea. The inferior thyroid arteries arise just below the isthmus of the thyroid, which sits atop the trachea. These arteries join (anastamoses) with ascending branches of the bronchial arteries, which are direct branches from the aorta, to supply blood to the trachea. The lymphatic vessels of the trachea drain into the pretracheal nodes that lie in front of the trachea, and paratracheal lymph nodes that lie beside it.
==== Putative receptor targets ==== The table highlights several common cannabinoids along with putative receptor targets and therapeutic properties. Exogenous (plant-derived) phytocannabinoids are identified with an asterisk while remaining chemicals represent well-known endocannabinoids (i.e., endogenously produced cannabinoid receptor ligands).
Sources: en.wikipedia.org
A large group of primarily lichenized fungi (the subclass Ostropomycetidae) apparently lost the ability to form lichens early in its history, reverting to a saprotrophic lifestyle. Later, some descendants regained a photobiont and lichenized again. This finding contradicts older assumptions that once a fungus became obligately lichenized it could never revert. Lineages with complex thalli, especially those bearing cyanobacterial cephalodia, show higher estimated extinction rates: they diversify rapidly but are more prone to die out, perhaps because of ecological specialization. Such large-scale studies now link geological and climatic shifts, for example, the spread of angiosperm forests in the Late Cretaceous–Early Paleogene, to bursts of lichen diversification, revealing a more intricate evolutionary history. In simple terms, this means lichens diversified in bursts when new habitats (like forests with lots of new tree bark) became available. New high-throughput techniques are also solving smaller-scale questions once thought intractable. 'Museomics' now retrieves DNA from old, fragmented specimens. For instance, Leavitt and colleagues (2019) shotgun-sequenced decades-old historical type specimens of the Rhizoplaca melanophthalma group. From three crustose thalli they recovered more than a thousand gene regions, sufficient to position each specimen in a phylogenomic tree and match them with modern material. The data showed one specimen was the distinct species R.
== Safety == Although argon is non-toxic, it is 38% more dense than air and therefore considered a dangerous asphyxiant in closed areas. It is difficult to detect because it is colorless, odorless, and tasteless. A 1994 incident, in which a man was asphyxiated after entering an argon-filled section of oil pipe under construction in Alaska, highlights the dangers of argon tank leakage in confined spaces and emphasizes the need for proper use, storage and handling.
The efficacy of dapagliflozin to improve kidney outcomes and reduce cardiovascular death in people with chronic kidney disease was evaluated in a multicenter, double-blind study of 4,304 participants. In February 2023, the EU authorized dapagliflozin for extended use to cover heart failure patients across the full spectrum of left ventricular ejection fraction (LVEF), including those with mildly reduced and preserved ejection fraction.
In April 2012, the Xinjiang Border Defense Corps Female Special Service team (新疆公安边防总队女子特勤分队) was founded. In March 2015 it was renamed to the "Snowy Eagle Female Special Service team" (雪鹰女子特勤分队) at the Xinjiang Border Corps Training Base. At its founding in 2012, it only had 6 members, and by March 2015 it had 34 members. It assisted in security at the China Eurasia Expo multiple times. The Shenzhen Border Defense Detachment operated the Maritime Special Service Team (Nicknamed "Maritime Jiaolongs"), a police tactical unit which is dedicated to maritime anti-terrorism, search and rescue, combat diving and VBSS.
=== Microtemplate polymerization === The addition of a monomer precursor solution and crosslinking agent to a microtemplate, or mold-type device, can initiate polymerization and the formation of nanogels. This method can be used to create nanogels in specific shapes and load them with various small molecules. Lithographic microtemplate polymerization is a similar process that uses a photoinitiator and light to trigger the formation of nanogels. Lithographic microtemplate polymerization can produce smaller nanogels on a length scale of <200 nm, which has a higher resolution compared to microtemplate polymerization that does not require a photoinitiator.
Sources: en.wikipedia.org
Cool, dark, and dry conditions are standard, with storage at minus twenty degrees Celsius or below. Desiccant and sealed vials limit moisture uptake. Repeated warming and cooling of the container is generally avoided.
There is no single agreed limit, and laboratory practice varies widely. Refrigeration slows degradation, and freezing aliquots is often described for longer holding. Any visible cloudiness or precipitate indicates the solution should be discarded.
Mass spectrometry provides the most direct confirmation through molecular mass. Reversed-phase chromatography supports purity assessment, and peptide mapping or amino acid analysis can corroborate sequence. No single method establishes both purity and identity on its own.
No. It is a laboratory-made analog of growth hormone-releasing hormone. The natural hormone is a 44-residue peptide, while the analog is built on a shorter 29-residue fragment.