If you have been reading about angiotensin IV and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2026-01-30. Where a claim depends on a specific study, the study is described rather than over-claimed.
The full name often given is N-hexanoic-Tyr-Ile-(6)-aminohexanoic amide. This name indicates a chain containing tyrosine, isoleucine, and a six-carbon amino acid derivative. Databases list a CAS Registry Number and a molecular formula for the compound. The peptide is small compared with proteins, and its structure allows it to be studied in cell cultures and animal models. Exact identity depends on the supplier's synthesis and purification process. Minor impurities can remain after synthesis.
Chemically, dihexa belongs to a broader group of angiotensin IV analogs. Researchers have modified the natural peptide to alter stability, binding, or distribution. Such changes can affect how the molecule behaves in experiments. The parent peptide angiotensin IV is involved in various physiological processes, but the modified analog is not identical to it. Public summaries sometimes blur the distinction between the natural fragment and the synthetic research compound. This distinction matters when interpreting study results.
Dihexa is a synthetic peptide that has been examined in laboratory and animal research. Its design is based on angiotensin IV, a naturally occurring peptide fragment produced in the body. The short name dihexa appears in scientific papers and online discussions, while the full chemical name describes a modified peptide chain. It is not a vitamin, mineral, or plant-derived compound. Suppliers typically present it as a research chemical rather than an approved medicine.
Regulatory status varies by country, and dihexa is not widely approved as a medicine. In many jurisdictions it is treated as a research chemical, which limits its legal sale, possession, and human use. Products marketed online may lack verified purity or identity, and labels can be inaccurate. Researchers typically source material from suppliers that provide analytical documentation and follow institutional safety rules. Open questions remain about long-term stability, metabolite formation, and human pharmacokinetics.
Dihexa is typically supplied as a lyophilized powder for laboratory research. Lyophilization removes water and improves stability during transport and storage. The solid is commonly stored at -20 °C or lower, desiccated, and protected from light. Repeated freeze-thaw cycles and exposure to moisture can degrade peptides, so aliquoting and sealed containers are standard practice in most laboratory settings. These handling measures apply to research-grade material and do not imply clinical suitability.
Purity and identity are usually assessed with reverse-phase high-performance liquid chromatography (RP-HPLC) and mass spectrometry. RP-HPLC separates components by hydrophobicity and can estimate peptide purity. Mass spectrometry confirms molecular mass and helps detect truncations or modifications. Some laboratories also use amino acid analysis or nuclear magnetic resonance for structural verification. A certificate of analysis from a supplier may list these results, but independent verification is often recommended for critical work.
| Property | Value | Notes |
|---|---|---|
| Common name | Dihexa | Shorthand used in research literature and supplier catalogs. |
| CAS Registry Number | 1401708-83-5 | Identifier assigned to the synthetic peptide. |
| Molecular formula | C27H44N4O5 | Reported formula; verify with a certificate of analysis. |
| Appearance | White to off-white powder | Typical form for lyophilized research peptides. |
| Typical storage | −20 °C or below, desiccated | Common condition for peptide stability. |
The proposed mechanism involves interaction with the hepatocyte growth factor (HGF) system and its receptor, c-Met. Dihexa is described in some studies as an HGF mimetic, meaning it may mimic or enhance HGF-mediated signaling. Activation of c-Met can influence cell growth, survival, and cytoskeletal remodeling, pathways that intersect with synaptic plasticity. However, the precise binding targets and downstream events for dihexa are not fully established, and alternative mechanisms have been suggested.
Dihexa is a synthetic peptide with the chemical name N-hexanoic-Tyr-Ile-(6)-aminohexanoic amide, and it is structurally related to angiotensin IV, a naturally occurring peptide fragment. Researchers developed it as a modified analog intended to alter stability and activity relative to the parent peptide. Its short sequence and fatty acid chain distinguish it from many endogenous peptides, and published studies often describe it under the abbreviation dihexa. The compound is classified as a laboratory compound rather than an approved therapeutic in most jurisdictions.
Quality control usually combines reverse-phase high-performance liquid chromatography with mass spectrometry. Chromatography estimates purity and detects related impurities, while mass spectrometry supports molecular identity. Nuclear magnetic resonance can provide additional structural confirmation when needed. Stability data for dihexa are limited, and degradation pathways may depend on pH, temperature, and moisture. Open questions include long-term stability in different formulations and the effect of repeated freeze-thaw cycles on measured purity. Such tests help confirm that a batch matches its label before use.
In laboratory settings, dihexa is typically handled as a lyophilized peptide powder. Appropriate personal protective equipment and a ventilated workspace are standard practices for weighing and transferring research chemicals. Because the compound lacks regulatory approval for clinical use, it should not be given to people. Institutional safety rules and local regulations govern its acquisition, storage, and disposal. Suppliers often provide a certificate of analysis that lists purity, identity, and batch-specific handling notes.
Dissolution depends on the peptide’s salt form, purity, and the chosen solvent. Dimethyl sulfoxide is commonly used to prepare concentrated stock solutions, while aqueous buffers may show limited solubility. Sonication or gentle warming can sometimes aid dissolution, but excessive heat may promote degradation. Once in solution, the material is generally kept cold and protected from light. Researchers should verify solubility for each lot rather than assuming uniform behavior across suppliers.
Human safety data are sparse. No widely accepted dosing regimen, long-term safety profile, or clinical efficacy endpoint has been established. Published animal results can suggest directions for further study, but species differences and study design limit direct translation. Open questions include bioavailability, blood-brain barrier penetration, metabolism, and whether observed effects arise from a single target or multiple pathways. Replication across independent laboratories remains an important benchmark for evaluating the strength of preclinical claims.
Most published reports on dihexa come from cell cultures and animal models. Studies have examined markers of synapse formation, dendritic spine density, and performance on learning tasks in rodents. Proposed mechanisms center on hepatocyte growth factor and its c-Met receptor, with additional attention to angiotensin IV-related pathways. These findings are experimental and have not been confirmed as clinical benefits in humans. The literature often uses different tasks and endpoints, which complicates direct comparison across studies.
Regulatory status differs by country, but dihexa is generally not approved as a therapeutic product. It is often sold as a research chemical, which means purity, labeling, and handling fall outside pharmaceutical drug standards. Some jurisdictions restrict the sale of peptides intended for human consumption. Researchers and suppliers may therefore face different legal requirements depending on location. Import rules and customs enforcement can also affect how such compounds move across borders.
== Drug derivatives == Melamine is part of the core structure for a number of drugs including almitrine, altretamine, cyromazine, ethylhexyl triazone, iscotrizinol, meladrazine, melarsomine, melarsoprol, tretamine, trinitrotriazine, and others.
Antiviral drugs are a class of medication used specifically for treating viral infections. Like antibiotics, specific antivirals are used for specific viruses. They should be distinguished from viricides, which actively deactivate virus particles outside the body. Many antiviral drugs are designed to treat infections by retroviruses, including HIV. Important antiretroviral drugs include the class of protease inhibitors. Herpes viruses, best known for causing cold sores and genital herpes, are usually treated with the nucleoside analogue acyclovir. Viral hepatitis is caused by five unrelated hepatotropic viruses (A-E) and may be treated with antiviral drugs depending on the type of infection. Some influenza A and B viruses have become resistant to neuraminidase inhibitors such as oseltamivir, and the search for new substances continues.
In June 2023, Starbucks attracted controversy for allegedly not allowing workers at some locations in 22 states to put up Pride Month decorations. It came during an ongoing public furor over the direction of LGBTQ+ rights in the US, with other major corporations, like Target and AB-InBev, which manufactures Bud Light, also receiving heightened criticism and scrutiny. A strike at some stores was announced as a result.
=== Sézary cells === Sézary cells are bigger than Lutzner cells, and have an overabundance of cellular folds in the membrane. They are also considered over pigmented and have large cerebriform nuclei with a small cytoplasm. Sézary cells are found in both mycosis fungoides and Sézary disease.
=== Drawing paste === In the United Kingdom, a medication containing magnesium sulfate, called "drawing paste", is claimed to be useful for small boils or localised infections, and removing splinters. The standard British Pharmacopoeia composition is dried magnesium sulfate 47.76% (by mass), phenol 0.49%, and glycerol to balance.
Sources: en.wikipedia.org
==== Capping ==== Capping of the pre-mRNA involves the addition of 7-methylguanosine (m7G) to the 5' end. To achieve this, the terminal 5' phosphate requires removal, which is done with the aid of enzyme RNA triphosphatase. The enzyme guanosyl transferase then catalyses the reaction, which produces the diphosphate 5' end. The diphosphate 5' end then attacks the alpha phosphorus atom of a GTP molecule in order to add the guanine residue in a 5'5' triphosphate link. The enzyme (guanine-N7-)-methyltransferase ("cap MTase") transfers a methyl group from S-adenosyl methionine to the guanine ring. This type of cap, with just the (m7G) in position is called a cap 0 structure. The ribose of the adjacent nucleotide may also be methylated to give a cap 1. Methylation of nucleotides downstream of the RNA molecule produce cap 2, cap 3 structures and so on. In these cases the methyl groups are added to the 2' OH groups of the ribose sugar. The cap protects the 5' end of the primary RNA transcript from attack by ribonucleases that have specificity to the 3'5' phosphodiester bonds. . Note that in plants and some other eukaryotes, Nicotinamide adenine dinucleotide has also been identified as a cap in plants, human, and yeast, with scientists proposing this may be a mechanism to regulate gene expression via metabolites.
=== Awards === In 2003, the Laténium received the European Museum of the Year Award awarded by the Council of Europe the for its contribution for a better understanding of the european cultural heritage. The Laténium was the first swiss museum to receive the award. In 2018, it received the Medal for archaeological mediation of the International Union for Prehistoric and Protohistoric Sciences. The Laténium's commitment to the popularisation of archaeology and for the social valorisation of the protection of the cultural heritage got the museum the award.
=== Mechanobiology === The elastic modulus of polyacrylamide can be changed by varying the ratio of monomer to cross-linker during the fabrication of polyacrylamide gel. This property makes polyacrylamide useful in the field of mechanobiology, as a number of cells respond to mechanical stimuli.
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=== By children in Gaza === In November 2023, a group of children outside al-Shifa Hospital held a press conference asking the world for an end to the war. A small group of children in Rafah held their own protest in advance of a planned Rafah offensive in February 2024, holding signs in English that read "We refuse to die" and "Save us from this genocide". Children in Rafah again held their own protest against the Gaza Strip famine on 6 March, holding a banner reading "Stop our daily death". In February 2024, a boy wounded in an Israeli attack stated, "I don’t know why they attacked me. They are picking fights against the children of Palestine. Why?" In July 2024, a 10th grade student in Ramallah said hearing explosions on the news "just twisted something inside of me, like I felt those emotions coming out. I was scared. I was terrified, actually. It could be me next."
Sources: en.wikipedia.org
Arthrogryposis multiplex due to muscular dystrophy. Arthrogryposis ectodermal dysplasia other anomalies, also known as Cote Adamopoulos Pantelakis syndrome, Trichooculodermovertebral syndrome, TODV syndrome and Alves syndrome. Arthrogryposis epileptic seizures migrational brain disorder. Arthrogryposis IUGR thoracic dystrophy, also known as Van Bervliet syndrome. Arthrogryposis-like disorder, also known as Kuskokwim disease. Arthrogryposis-like hand anomaly and sensorineural deafness. Arthrogryposis multiplex congenita CNS calcification. Arthrogryposis multiplex congenita distal (AMCD), also known as X-linked spinal muscular atrophy type 2. Gordon syndrome, also known as distal arthrogryposis type 3. Arthrogryposis multiplex congenita, distal type 2A, also known as Freeman–Sheldon syndrome. Arthrogryposis multiplex congenita, distal type 2B, also known as Sheldon–Hall syndrome. Arthrogryposis multiplex congenita neurogenic type (AMCN). This particular type of AMC has been linked to the AMCN gene on locus 5q35. Arthrogryposis multiplex congenita pulmonary hypoplasia, also with a large number of synonyms. Arthrogryposis multiplex congenita whistling face, also known as Illum syndrome. Arthrogryposis multiplex congenita, distal type 1 (AMCD1). Arthrogryposis multiplex with deafness, inguinal hernias, and early death. This syndrome is suspected to be inherited in an X-linked or autosomal recessive fashion. There were only three reported cases with all three patients dead. Arthrogryposis ophthalmoplegia retinopathy, also known as Oculomelic amyoplasia.
== Further reading == "Electronic nicotine delivery systems" (PDF). World Health Organization. 21 July 2014. pp. 1–13. Linda Bauld; Kathryn Angus; Marisa de Andrade (May 2014). "E-cigarette uptake and marketing" (PDF). Public Health England. UK. pp. 1–19. McNeill, A; Brose, LS; Calder, R; Bauld, L; Robson, D (February 2018). "Evidence review of e-cigarettes and heated tobacco products 2018" (PDF). Public Health England. UK. pp. 1–243. McNeill, A; Brose, LS; Calder, R; Hitchman, SC; Hajek, P; McRobbie, H (August 2015). "E-cigarettes: an evidence update" (PDF). Public Health England. UK. pp. 1–113. National Academies of Sciences, Engineering, and Medicine; et al. (Committee on the Review of the Health Effects of Electronic Nicotine Delivery Systems) (January 2018). Stratton, Kathleen; Kwan, Leslie Y.; Eaton, David L. (eds.). Public Health Consequences of E-Cigarettes. Washington, DC: National Academies Press. Bibcode:2018nap..book24952N. doi:10.17226/24952. ISBN 978-0-309-46834-3. PMID 29894118. Retrieved 15 January 2023. Summary National Center for Chronic Disease Prevention Health Promotion (US) Office on Smoking Health (2014). The Health Consequences of Smoking—50 Years of Progress: A Report of the Surgeon General. Surgeon General of the United States. pp. 1–943. PMID 24455788. "State Health Officer's Report on E-Cigarettes: A Community Health Threat" (PDF). California Tobacco Control Program. California Department of Public Health. January 2015. pp. 1–21. This article incorporates text from this source, which is in the public domain.
Caldo de cardán (lit. 'driveshaft broth'), known by the moniker "The Viagra of the Andes", is a Bolivian cuisine bull penis and testicle soup. A speciality of El Alto and La Paz, the soup is eaten for its perceived benefits as a stimulant, aphrodisiac and hangover cure, and for pain relief. Caldo de cardán typically features many other meats, such as beef tendon, ribs, and ch'arki, as well as hardboiled eggs, potatoes, rice, onions and llajua. The soup is simmered for over ten hours and typically served on weekends, particularly Sunday morning, at a high temperature.
SlimPort, a brand of Analogix products, complies with Mobility DisplayPort, also known as MyDP, which is an industry standard for a mobile audio/video Interface, providing connectivity from mobile devices to external displays and HDTVs. SlimPort implements the transmission of video up to 4K-UltraHD and up to eight channels of audio over the micro-USB connector to an external converter accessory or display device. SlimPort products support seamless connectivity to DisplayPort, HDMI and VGA displays. The MyDP standard was released in June 2012, and the first product to use SlimPort was Google's Nexus 4 smartphone. Some LG smartphones in LG G series also adopted SlimPort. SlimPort is an alternative to Mobile High-Definition Link (MHL).
Plasmids are double-stranded extra chromosomal and generally circular DNA sequences that are capable of replication using the host cell's replication machinery. Plasmid vectors minimalistically consist of an origin of replication that allows for semi-independent replication of the plasmid in the host. Plasmids are found widely in many bacteria, for example in Escherichia coli, but may also be found in a few eukaryotes, for example in yeast such as Saccharomyces cerevisiae. Bacterial plasmids may be conjugative/transmissible and non-conjugative:
Sources: en.wikipedia.org
Dihexa is a synthetic peptide modeled on angiotensin IV. It is used in laboratory and animal research, not as an approved medicine. Human effects remain poorly characterized.
It is produced by chemical synthesis, not extracted from plants or animals. Its design is based on a naturally occurring peptide fragment. Suppliers sell it as a research chemical.
No, dihexa is a modified analog of angiotensin IV. The two share a structural relationship but differ in chemical details. Research on one does not automatically apply to the other.
The lyophilized powder is generally stored at -20 °C or lower, desiccated, and protected from light. Solutions are often aliquoted to avoid repeated freeze-thaw cycles. Specific stability data may vary by formulation and purity.