Everything below concerns heptapeptide. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-05-24. Numbers and descriptions here follow the published literature rather than marketing material.
Terminology around the compound varies by source. It appears in catalogues and papers as Semax, as the heptapeptide ACTH(4-7)-Pro-Gly-Pro, and under various alphanumeric laboratory codes used by individual suppliers. These names refer to the same sequence but may imply different salt forms, purity grades, or counter-ions. Peptide databases usually list the free base mass, while product descriptions sometimes report acetate or trifluoroacetate salts with a different formula weight. Because naming conventions for research peptides are not standardised across vendors, checking the declared sequence and measured mass is more reliable than relying on a trade name alone.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. Its design combines the ACTH(4-7) core fragment with a C-terminal Pro-Gly-Pro extension, a modification intended to improve stability and prolong activity. The molecule is hydrophilic, carries no lipid chains or glycosylation, and has a theoretical mass just over 810 daltons in its free form. All seven residues are proteinogenic amino acids, so no non-natural building blocks appear in the backbone. A free N-terminal methionine and C-terminal proline define the unmodified parent peptide.
Development is attributed to researchers at the Institute of Molecular Genetics in Moscow during the early 1980s, building on earlier Soviet work with ACTH fragments. Russian regulatory approval followed for intranasal use, and the compound has remained commercially available there for decades. Most published human data originate from Russian and, later, some Eastern European clinical reports, which are not always accessible in English translation. Outside that region the material is generally handled as a research chemical rather than a licensed medicine.
Regulatory status differs sharply between jurisdictions. In Russia the peptide is registered as a prescription nasal preparation, while agencies such as the United States Food and Drug Administration have not approved it for any indication. Products sold elsewhere are typically labeled for laboratory research only, and such labels shift responsibility for safe handling to the purchaser. Because the same name covers pharmaceutical-grade nasal drops and bulk research powder, identity and purity documentation becomes the main practical concern when comparing sources.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic heptapeptide | ACTH(4-7) analogue |
| Sequence | Met-Glu-His-Phe-Pro-Gly-Pro | Free N terminus, unmodified side chains |
| Molecular weight | 813.9 Da | Free base; salt forms differ |
| Appearance | White to off-white powder | Lyophilised solid |
| Solubility | Freely soluble in water | Hydrophilic; polar solvents preferred |
研究兴趣主要集中在神经营养因子相关的路径上，包括脑源性神经营养因子与神经生长因子的表达变化。部分实验报告称在特定条件下观察到这些因子的水平上升，但具体信号通路和剂量依赖关系仍未完全厘清。多数公开数据来自细胞模型和动物实验，人体对照研究数量有限。因此，该化合物的作用机制在文献中属于活跃讨论，而非已经确立的定论。
Semax 是一种人工合成的七肽，氨基酸序列为 Met-Glu-His-Phe-Pro-Gly-Pro，单字母缩写记作 MEHFPGP。它被归类为促肾上腺皮质激素片段 ACTH(4-10) 的结构类似物，但并不天然存在于生物体内。母体片段 ACTH(4-10) 的序列为 Met-Glu-His-Phe-Arg-Trp-Gly，Semax 替换了中间两个残基，并在羧基端延长了 Pro-Gly-Pro 三肽。这种延长被普遍认为能提升分子对肽酶的耐受性。
An ultraviolet light can be used in the early phase of this disease for identification and to determine the effectiveness of treatment. Under a Wood's light, skin will change colour (fluoresce) when it is affected by certain bacteria, fungi, and changes to pigmentation of the skin. Past classifications of vitiligo have been somewhat inconsistent, but two forms are currently recognized.
=== Weight loss === Chitosan is marketed in a tablet form as a "fat binder". Although the effect of chitosan on lowering cholesterol and body weight has been evaluated, the effect appears to have no or low clinical importance. Reviews from 2016 and 2008 found there was no significant effect, and no justification for overweight people to use chitosan supplements. In 2015, the U.S. Food and Drug Administration issued a public advisory about supplement retailers who made exaggerated claims concerning the supposed weight loss benefit of various products.
== Biosynthesis == 1-Methylnicotinamide can be produced in the liver by nicotinamide N-methyltransferase (NNMT). The reaction takes place during the metabolism of NAD+ (nicotinamide adenine dinucleotide). NNMT is also present in brain tissue, adipose tissue, muscle tissue, kidneys, and skin. NNMT (nicotinamide N-methyltransferase) is an enzyme that in humans is encoded by the NNMT gene. NNMT catalyzes the methylation of nicotinamide and similar compounds using the methyl donor S-adenosyl methionine (SAM-e) to produce S-adenosyl-L-homocysteine (SAH) and 1-methylnicotinamide. NNMT is highly expressed in the human liver.
== Further reading == Kim, Ji Hun; Chang, Tsz M; Graham, Alison N; Choo, K HA; Kalitsis, Paul; Hudson, Damien F (2010). "Streptavidin-Binding Peptide (SBP)-tagged SMC2 allows single-step affinity fluorescence, blotting or purification of the condensin complex". BMC Biochemistry. 11: 50. doi:10.1186/1471-2091-11-50. PMC 3022668. PMID 21194474. Zhang, Heng; Liu, Chen-Ying; Zha, Zheng-Yu; Zhao, Bin; Yao, Jun; Zhao, Shimin; Xiong, Yue; Lei, Qun-Ying; Guan, Kun-Liang (2009). "TEAD Transcription Factors Mediate the Function of TAZ in Cell Growth and Epithelial-Mesenchymal Transition". Journal of Biological Chemistry. 284 (20): 13355–62. doi:10.1074/jbc.M900843200. PMC 2679435. PMID 19324877.
Sources: en.wikipedia.org
=== Metabolism === H. influenzae uses the Embden–Meyerhof–Parnas (EMP) pathway for glycolysis and the pentose phosphate pathway, which is anabolic rather than catabolic. The citric acid cycle is incomplete and lacks several enzymes that are found in a fully functioning cycle. The enzymes missing from the TCA cycle are citrate synthase, aconitate hydratase, and isocitrate dehydrogenase. H. influenzae has been found in both aerobic and anaerobic environments, as well as environments with different pH's.
Unusually-shaped ends of one or more bones where they form a joint, or an abnormally shallow angle of the bone, such as in coxa valga. A mutation in collagen or collagen-related genes (as found in certain types of Ehlers-Danlos syndrome) or other connective tissue (as found in Loeys–Dietz syndrome and Marfan syndrome) resulting in weakened ligaments/ligamentous laxity. Ligaments hold bones together at the joints. Abnormal joint proprioception (an impaired ability to locate body parts in space and/or monitor an extended joint) Hypermobility tends to run in families, suggesting a genetic basis for at least some forms. The term double jointed is often used to describe hypermobility; however, the name is a misnomer and should not be taken literally, as people with hypermobile joints do not have any extra joints, or any extra bones or parts in the joint. Symptoms are often exacerbated during pregnancy. During pregnancy, the body releases relaxin and certain hormones that alter ligament physiology, easing the stretching needed to accommodate fetal growth as well as the birthing process. The combination of hypermobility and pregnancy-related pelvic girdle during pregnancy can be debilitating. The pregnant woman with hypermobile joints may be in significant pain as muscles and joints adapt to the pregnancy. Pain makes standing or walking difficult during pregnancy, so some women who have one of these disorders find they need to use a wheelchair during pregnancy.
Myelin has two important advantages: fast conduction speed and energy efficiency. For axons larger than a minimum diameter (roughly 1 micrometre), myelination increases the conduction velocity of an action potential, typically tenfold. Conversely, for a given conduction velocity, myelinated fibers are smaller than their unmyelinated counterparts. For example, action potentials move at roughly the same speed (25 m/s) in a myelinated frog axon and an unmyelinated squid giant axon, but the frog axon has a roughly 30-fold smaller diameter and 1000-fold smaller cross-sectional area. Also, since the ionic currents are confined to the nodes of Ranvier, far fewer ions "leak" across the membrane, saving metabolic energy. This saving is a significant selective advantage, since the human nervous system uses approximately 20% of the body's metabolic energy. The length of axons' myelinated segments is important to the success of saltatory conduction. They should be as long as possible to maximize the speed of conduction, but not so long that the arriving signal is too weak to provoke an action potential at the next node of Ranvier. In nature, myelinated segments are generally long enough for the passively propagated signal to travel for at least two nodes while retaining enough amplitude to fire an action potential at the second or third node. Thus, the safety factor of saltatory conduction is high, allowing transmission to bypass nodes in case of injury.
Rilwanu Lukman- former Minister of Petroleum Resources and Mines, Power, Steel; and former secretary general OPEC. Maikanti Baru - engineer, former GMD Of NNPC Limited. Mohammed Bello-Koko - former managing director of the Nigerian Ports Authority Muhammed Babandede - former Comptroller General (CG) of the Nigeria Immigration Service NIS. Ahmad Salihijo Ahmad - former managing director of Nigerian Rural Electrification Agency. M.T. Usman - former permanent secretary ministry of Works. Abubakar Dantsoho - Managing Director of the Nigerian Ports Authority (NPA). Hamman Bello - former Comptroller- General Of Nigeria Customs Service. Musa Yar'Adua - Minister of Lagos Affairs 1960 -1966, Matawalle of the Katsina Emirate. Muhammadu Ribadu – first minister of defence after independence, founder of the Nigerian Defence Academy. Mansur Muhtar – economist, former Nigerian Federal minister of finance (2008 -2010), former director World Bank, presently vice chairman, Islamic Development Bank. Tajudeen Abbas - Speaker of the House of Representatives of Nigeria. Abubakar Olusola Saraki – (Fulani/Yoruba); former president of the Senate. Gbemisola Ruqayyah Saraki – (Fulani/Yoruba); former Senator Kwara Central, current Minister of State. Transportation of the Federal Republic of Nigeria. Nigeria. Aisha Dikko - former attorney general, commissioner of Justice Kaduna. Bukola Saraki – (Fulani/Yoruba); former president of the Nigerian Senate; former Governor of Kwara State and former Senator Kwara Central, Nigeria. Captain Muhammad Bala Shagari – politician, former Nigerian Army officer.
=== Maintenance and surveillance === Ideally, wound dressings should be changed daily to promote a clean environment and allow for daily evaluation of wound progression. Highly exudative wounds and infected wounds should be monitored closely and may require more frequent dressing changes. Negative pressure wound dressings can be changed less frequently, every 2–3 days. Wound progression over time can be monitored with transparent sheet tracings or photographs, each of which produce reliable measurements of wound surface area.
Sources: en.wikipedia.org
It is a synthetic seven-amino-acid peptide built from the ACTH(4-7) sequence plus a Pro-Gly-Pro tail. It belongs to the family of short ACTH fragments studied for nervous-system effects. Its backbone contains only standard amino acids.
It contains the 4-7 fragment of adrenocorticotropic hormone extended at the C terminus. That truncation removes the region associated with steroidogenic activity. The design intent was to keep neurotrophic properties while avoiding full hormonal effects.
No natural source of the intact heptapeptide is known. It is produced by solid-phase peptide synthesis. Some related ACTH fragments arise as hormone processing products, but the Pro-Gly-Pro extension is a designed addition rather than a natural sequence.
It is a short synthetic peptide built from seven amino acids: methionine, glutamic acid, histidine, phenylalanine and three prolines. The sequence derives from the 4-10 fragment of adrenocorticotropic hormone with an added proline-glycine-proline tail. No plant or animal extract is involved; the material is produced by solid-phase peptide synthesis.