This is a working overview of RP-HPLC, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2025-08-15. Anything still debated is marked as such rather than presented as settled.
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.
The second form adds a maleimide-bearing linker to the lysine at the carboxyl end. This group reacts with cysteine-34 on circulating serum albumin, forming a covalent bond that keeps the peptide in the bloodstream for far longer. ConjuChem developed the molecule as a way to extend the action of a peptide without frequent administration. The albumin attachment is the defining structural feature of the drug affinity complex version. Whether continuous exposure produces effects distinct from shorter pulses remains an unresolved research question.
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.
| 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 |
Reported half-lives differ widely between the two variants and between species. Values for the albumin-binding form are usually expressed in days, while the unconjugated form is measured in minutes to a few hours. Sampling schedules, assay sensitivity, and route of administration all influence the numbers, which limits direct comparison across studies. Whether sustained receptor occupancy produces different downstream effects from pulsatile stimulation remains an open question in the published work. Claims about relative potency should therefore be read alongside the specific study design that produced them.
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.
Binding to GHRH receptors on pituitary somatotroph cells triggers cyclic AMP signaling and stimulates growth hormone synthesis and release. Because the peptide acts upstream of the pituitary, effects are mediated through endogenous growth hormone rather than direct receptor activation in peripheral tissues. Increases in insulin-like growth factor 1 are generally described as a downstream consequence. Most published human exposure data come from small early-stage studies, and the clinical significance of the pharmacokinetic profile remains incompletely characterized.
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.
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.
At the pituitary, the peptide binds the growth hormone-releasing hormone receptor on somatotroph cells. Receptor activation raises intracellular cyclic AMP and triggers release of stored growth hormone. Somatostatin and other hypothalamic signals modulate this response. Negative feedback from insulin-like growth factor 1 also influences output. The same regulatory architecture operates with the native hormone. Whether the synthetic analog alters feedback dynamics over repeated exposure remains an open question. Most published receptor work uses cell models rather than intact human systems.
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.
== Advertising == Sonic ran its first television advertisement in 1977. One of the company's most memorable advertising campaigns, which ran from 1987 to 1993, featured Frankie Avalon. In May 1999, the company began a new campaign featuring the character Katie the Carhop. Sonic was also involved with NASCAR. The company contracted with Richard Childress Racing in late 2000 to be an associate sponsor for Dale Earnhardt Sr. during the 2001 NASCAR Winston Cup Series season. After Earnhardt died in an accident at the 2001 Daytona 500, the company continued its sponsorship with his replacement driver Kevin Harvick, through the end of the 2003 season. Sonic returned to NASCAR several years later to sponsor Sam Hornish Jr. and Richard Petty Motorsports in 2015. In 2004, the company became more widely known nationally by advertising in television markets hundreds of miles from its nearest franchise. Improvisational actors T. J. Jagodowski and Peter Grosz became known to American television viewers from their "Two Guys" series of commercials. Similar series of ads for the company have featured other duos of improvisational performers, including Molly Erdman and Brian Huskey, Katie Rich and Sayjal Joshi, and Emily Wilson and Tim Baltz. In 2010, national auditions were held and a new series of commercials began airing, some of which featured carhops from Wisconsin and Austin, Texas. In 2012 the "Two Guys" returned to the company's television ads. In 2018 Sonic supplemented their "Two Guys" commercials with complementary "Two Gals" commercials.
=== Cough suppression === The primary use of dextromethorphan is as a cough suppressant, for the temporary relief of cough caused by minor throat and bronchial irritation (such as commonly accompanies the flu and the common cold), or from inhaled particle irritants, as well as chronic cough at a higher dosage. In December 2025, the combination medication naproxen/dextromethorphan/guaifenesin (brand name Mucinex 12HR Cold & Fever Multi-Symptom) was approved for medical use in the United States.
=== Blood, lymph and nerve supply === The thyroid is supplied with arterial blood from the superior thyroid artery, a branch of the external carotid artery, and the inferior thyroid artery, a branch of the thyrocervical trunk, and sometimes by an anatomical variant the thyroid ima artery, which has a variable origin. The superior thyroid artery splits into anterior and posterior branches supplying the thyroid, and the inferior thyroid artery splits into superior and inferior branches. The superior and inferior thyroid arteries join behind the outer part of the thyroid lobes. The venous blood is drained via superior and middle thyroid veins, which drain to the internal jugular vein, and via the inferior thyroid veins. The inferior thyroid veins originate in a network of veins and drain into the left and right brachiocephalic veins. Both arteries and veins form a plexus between the two layers of the capsule of the thyroid gland. Lymphatic drainage frequently passes the prelaryngeal lymph nodes (located just above the isthmus) and the pretracheal and paratracheal lymph nodes. The gland receives sympathetic nerve supply from the superior, middle and inferior cervical ganglion of the sympathetic trunk. The gland receives parasympathetic nerve supply from the superior laryngeal nerve and the recurrent laryngeal nerve.
=== Before 1873 === Prior to Japan adopting the Gregorian calendar, it used the lunisolar Japanese calendar. The first five years of the era correspond to the following date ranges in the Gregorian calendar:
Sources: en.wikipedia.org
An alpha helix (or α-helix) is a sequence of amino acids in a protein that are twisted into a coil (a helix). The alpha helix is the most common structural arrangement in the secondary structure of proteins. It is also the most extreme type of local structure, and it is the local structure that is most easily predicted from a sequence of amino acids. The alpha helix has a right-handed helix conformation in which every backbone N−H group hydrogen bonds to the backbone C=O group of the amino acid that is four residues earlier in the protein sequence.
==== Irradiation ==== Food irradiation is another notable biological engineering process to achieve food safety. Research into the potential utilization of ionizing irradiation for food preservation started in the 1940s as an extension of studies on the effect of radiation on living cells. The FDA approved usage of ionizing radiation on food products in 1990. This radiation removes electrons from atoms, and these electrons go on to damage the DNA of microorganisms living in the food, killing the microorganisms. Irradiation can be used to pasteurize food products, such as seafood, poultry, and red meat, thus making these food products safer for consumers. Some irradiation is also used to delay fruit ripening processes, which can kill microorganisms that accelerate the ripening and spoilage of produce. Low dosages of radiation can also be used to kill insects living in harvested crops, as the radiation will stunt the insects' development at various stages and damage their ability to reproduce.
=== Breeding === The male builds a floating bubble nest in which the eggs are laid. Unlike other bubble nest builders, males will incorporate bits of plants, twigs, and other debris, which hold the nest together better. The water level should be reduced to 7–10 cm (3–4 in) during spawning, and the temperature should be approximately 28–30 °C (86 °F). Vegetation is essential, as males build their bubble nest using plant material, which they bind together with bubbles. Nests are very elaborate and sturdy, reaching several inches across and an inch deep. Limnophila aquatica, Riccia fluitans, Ceratopteris thalictroides, and Vesicularia dubyana, are good choices for the breeding tank. Peat fiber may also be offered as building material. Once the nest has been built the male will begin courting the female, usually in the afternoon or evening. He signals his intentions by swimming around the female with flared fins, attempting to draw her to the nest where he will continue his courting display. If the female accepts the male she will begin swimming in circles with the male beneath the bubble nest. When she is ready to spawn she touches the male on either the back or the tail with her mouth. Upon this signal the male will embrace the female, turning her first on her side and finally on her back. At this point the female will release approximately five dozen clear eggs, which are immediately fertilized by the male. Most of the eggs will float up into the bubble nest. Eggs that stray are collected by the male and placed in the nest.
In March 2017, Lilly acquired CoLucid Pharmaceuticals for $960 million, obtaining the late clinical-stage migraine therapy candidate lasmiditan. In August 2017, Lilly and Shionogi jointly licensed their product varespladib to Ophirex for Ophirex's novel snakebite treatment program. In May 2018, Lilly acquired Armo Biosciences for $1.6 billion, obtaining the white blood cell-boosting cancer treatment candidate pegilodecakin. Days later, the company announced it would acquire Aurora kinase A inhibitor developer AurKa Pharma, and control over the lead compound, AK-01, for up to $575 million. In January 2019, Lilly announced it would acquire Loxo Oncology for $235 per share, valuing the business at around $8 billion, which significantly expanded the business's oncology offerings. The deal gave Lilly Loxo's oral TRK inhibitor, Vitrakvi (Larotrectinib), LOXO-292, an oral proto-oncogene receptor tyrosine kinase rearranged during transfection (RET) inhibitor, LOXO-305, an oral Bruton's tyrosine kinase (BTK) inhibitor, and LOXO-195, a follow-on TRK inhibitor. In March 2019, the company completed the corporate spin-off of Elanco. In August 2019, Elanco acquired the Bayer animal health business for $7.6 billion. In January 2020, the company announced its acquisition of Dermira for $1.1 billion, gaining control of lebrikizumab, glycopyrronium cloth used in the treatment of hyperhidrosis, and other assets.
The mould needs air to grow, so cultivation required a container with a large surface area. Initially, glass bottles laid on their sides were used. Most laboratory containers did not provide a large, flat area, and so were an uneconomical use of incubator space. The bedpan was found to be practical, and was the basis for specially-made ceramic containers fabricated by J. Macintyre and Company in Burslem. These containers were rectangular in shape and could be stacked to save space. The MRC agreed to Florey's request for £300 (equivalent to £15,000 in 2025) and £2 each per week (equivalent to £97 in 2025) for two women factory hands. In 1943 Florey asked for their wages to be increased to £2 10s each per week (equivalent to £99 in 2025). Heatley collected the first 174 of an order for 500 vessels on 22 December 1940, and they were seeded with spores three days later. Efforts were made to coax the mould into producing more penicillin. Heatley tried adding various substances to the medium, including sugars, salts, malts, alcohol and even marmite, without success. At the suggestion of Paul Fildes, he tried adding brewing yeast. This did not improve the yield either, but it did cut the incubation time by a third. The team also discovered that if the penicillin-bearing fluid was removed and replaced by fresh fluid, a second batch of penicillin could be prepared, but this practice was discontinued after eighteen months due to the danger of contamination. The mould had to be grown under sterile conditions.
Sources: en.wikipedia.org
=== Adobe ColdFusion (2016 Release) === Adobe ColdFusion (2016 release), known generically as ColdFusion 2016 was released on February 16, 2016. During development, it was codenamed Raijin. New or improved features available in all editions (Standard, Enterprise, and Developer) include:
==== Actions ==== The NBOMe drugs are highly potent and selective agonists of the serotonin 5-HT2 receptors, including of the 5-HT2A, 5-HT2B, and 5-HT2C receptors. However, they are much less potent and efficacious at the serotonin 5-HT2B receptor compared to the serotonin 5-HT2A and 5-HT2C receptors. The drugs are highly selective for the serotonin 5-HT2 receptors over other serotonin receptors and over a variety of other biological targets. They are likewise inactive as monoamine reuptake inhibitors and releasing agents. Many of the NBOMe drugs are partial agonists of the rat and mouse trace amine-associated receptor 1 (TAAR1), but they are inactive as agonists of the human TAAR1.
It is known also as simpler's joy or holy herb, or more ambiguously as mosquito plant or wild hyssop. The common name blue vervain is also sometimes used, but also refers to V. hastata. Being the only member of its genus in much of its range, it is also simply known as vervain locally. The common names of V. officinalis in many Central and Eastern European languages often associate it with iron, for example:
=== Surgery === As thymomas are seen in 10% of all people with the MG, they are often given a chest X-ray and CT scan to evaluate their need for surgical removal of their thymus glands and any cancerous tissue that may be present. Even if surgery is performed to remove a thymoma, it generally does not lead to the remission of MG. Surgery in the case of MG involves the removal of the thymus, although in 2013, no clear benefit was indicated except in the presence of a thymoma. A 2016 randomized, controlled trial, however, found some benefits.
3) Regulations 1993 (S.I. 1993/1540) Firearms (Dangerous Air Weapons) (Scotland) Amendment Rules 1993 (S.I. 1993/1541) First Community National Health Service Trust (Change of Name) Order 1993 (S.I. 1993/1543) Mental Health Foundation of Mid Staffordshire National Health Service Trust (Change of Name) Order 1993 (S.I. 1993/1544) Special Trustees for the Royal London Hospital (Transfer of Trust Property) Order 1993 (S.I. 1993/1545) Child Resistant Packaging (Safety) (Amendment) Regulations 1993 (S.I. 1993/1546) Toys (Safety)(Amendment) Regulations 1993 (S.I. 1993/1547) Addenbrooke's National Health Service Trust (Transfer of Trust Property) Order 1993 (S.I. 1993/1564) Foreign Fields (Specification) (Amendment) Order 1993 (S.I. 1993/1565) Foreign Fields (Specification) (No. 2) Order 1993 (S.I. 1993/1566) Reconstitution of the Dearne and Dove Internal Drainage Board Order 1993 (S.I. 1993/1570) European Communities (Designation)(No. 2) Order 1993 (S.I. 1993/1571) House of Commons Disqualification Order 1993 (S.I. 1993/1572) Child Abduction and Custody (Parties to Conventions) (Amendment) (No. 2) Order 1993 (S.I. 1993/1573) Extradition (Hijacking) (Amendment) Order 1993 (S.I. 1993/1574) Iraq (United Nations) (Sequestration of Assets) (Isle of Man) Order 1993 (S.I. 1993/1575) Family Law (Northern Ireland) Order 1993 (S.I. 1993/1576) Family Law (Northern Ireland Consequential Amendments) Order 1993 (S.I. 1993/1577) Fire Services (Amendment) (Northern Ireland) Order 1993 (S.I. 1993/1578) Social Security (Amendment) (Northern Ireland) Order 1993 (S.I.
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.