Halogénures organiques

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<p>Native Melan-A (26-35) decapeptide derives from the melanocyte lineage-specific protein Melan-A/MART-1, which is expressed in almost 75-100% of primary and metastatic melanomas.<br>The region 26-35 of Melan-A protein acts as an antigenic peptide that is recognized by CD8+ tumor-reactive cytolytic T lymphocytes (CTLs) for designing antigen-specific cancer vaccines1. It has been shown that CD8+ Melan-A-specific CTLs isolated from melanoma patients efficiently lyse the Melan-A-expressing HLA-A*0201+ melanoma cell line. However, CTLs preferentially recognize the Melan-A (26-35) peptide as compared with the Melan-A (27-35) peptide. Moreover, the Melan-A (26-35) A27L analog (ELAGIGILTV) has a higher binding affinity to HLA-A*0201 than the native Melan-A (26-35) peptide (EAAGIGILTV), and consequently displays more potent antigenicity and immunogenicity.<br>It has been reported that the concentration of Melan-A (26-35) A27L analog required to obtain 50% of maximal antigenic activity (EC50) is 0.01nM, whereas that of the native Melan-A (26-35) peptide is 0.25nM1. Therefore, the relative activity of Melan-A (26-35) A27L analog is 25 fold higher than that of the native Melan-A (26-35) peptide.<br>Furthermore, functional competition assay has shown that the concentration of Melan-A (26-35) A27L analog required to achieve 50% inhibition (IC50) of tumor lysis is 2nM, which is 10 fold lower than that of the native Melan-A (26-35) peptide. Regarding peptide stability in human serum, the half-lifes (t1/2) of the native Melan-A (26-35) peptide and the A27L analog are quite similar (45 and 40min, respectively) as measured by HPLC-ESI-MS, but much higher than that of the Melan-A (27-35) nonapeptide (5min).</p>

<p>4,5-Dichloro-2-nitroaniline is a chemical compound that has been shown to be an uncoupler of oxidative phosphorylation in ciliates. It is experimentally shown that the reaction yield for 4,5-Dichloro-2-nitroaniline is much higher than that of the corresponding methylbenzene. The two isomers are not detected in the gaseous phase, but only as products of thermal decomposition at high temperatures. Linear regression analysis and predictive models were used to evaluate the transfer and population growth rates at different temperatures. Narcosis was observed in rats exposed to 4,5-Dichloro-2-nitroaniline at concentrations greater than 0.1 ppm (0.1 mg/L).</p>

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<p>Perfluorodimethylcyclobutane is an organic compound that belongs to the class of perfluorinated compounds. It is a polymer film-forming agent with a chemical formula of C5H8F2. The chemical structure of this drug consists of a chlorine atom, two fluorine atoms, and two hydrogen atoms. The molecular weight is 126.7 g/mol. Perfluorodimethylcyclobutane has been used in microcapsules as an analytical chemistry tool and in the development of pharmaceutical drugs for cardiac conditions. This molecule has been used as a chromatographic science analytical method to identify fatty acids in petroleum products and chlorinated solvents.</p>

4-Methyl(pentafluorosulfanyl)benzene is a nitro-containing organic compound that can be synthesized by reacting bromoacetic acid with methylmagnesium chloride. This compound is an experimental intermediate in the synthesis of indazole and its analogs. The synthesis of 4-methyl(pentafluorosulfanyl)benzene has been used as a methodology to study the reactions of heterocyclic systems, as well as for the development of new biomolecules.

<p>2-Chloroethylamine hydrochloride is a chemical compound that has a hydroxyl group, which is an epoxide. It reacts with itself to form aziridine and amines, which are genotoxic compounds. 2-Chloroethylamine hydrochloride is used as an analytical method for the determination of the concentration of epoxides in air samples and can be produced by reacting chlorine with ethylamine. The reaction mechanism for this process is not well understood but it may involve coordination geometry and particle formation. This chemical compound can also be found in pharmaceutical drugs designed to treat cancer or heart disease.</p>

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4-Fluoro-2-nitroaniline is an amide that is a l1210 murine carcinogen. It is also an analytical reagent for the detection of nitrogen atoms in amines and thione compounds. 4-Fluoro-2-nitroaniline has been shown to be effective against cervical cancer, but not cancerous cells, which may be due to its ability to inhibit fatty acid synthesis. The carbon disulphide reacts with the nitro group of 4-fluoro-2-nitroaniline, resulting in the formation of a thione compound.

2-Chloro-4-nitro-6-bromoaniline is a dispersive, linear range, ammonolysis and chloride free oxidant for wastewater treatment. This compound is effective at removing organic pollutants from wastewater and has been shown to be both environmentally safe and cost effective. 2-Chloro-4-nitro-6-bromoaniline is also used as a polymerization initiator in the production of polyester resins. It can be manufactured by recycling anilines by reacting them with bromine in the presence of an acid catalyst. 2CNBBA is used as a hydrogen bond acceptor in microextraction of chlorinated compounds from water samples.

<p>N,N,N-Trimethyl-1-decanaminium bromide is a quaternary ammonium salt with the chemical formula CH3(CH2)5COOB. It is an ionic surfactant that is used as an emulsifier for water and oil based systems. N,N,N-Trimethyl-1-decanaminium bromide has been shown to be able to stabilize the surface tension in aqueous solutions and can be used in biomedical research. This compound also has the ability to bind proteins and other organic molecules. N,N,N-Trimethyl-1-decanaminium bromide may be used as a fluorescent probe for detecting hydrophobic effects in biological systems.</p>

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3,4-Diaminobenzotrifluoride is a photophysical agent that emits light of a specific wavelength when irradiated with ultraviolet light. It has been shown to inhibit the growth of human cervical carcinoma cells in vitro and to cause apoptosis in these cells. 3,4-Diaminobenzotrifluoride also inhibits the proliferation of human liver and lung cancer cells in vitro. The mechanism by which this agent causes cell death is unknown. 3,4-Diaminobenzotrifluoride is an acid catalyst and stabilizes the chloride ion. This agent may inhibit DNA synthesis or affect proteins that are involved in signal transduction pathways for cell proliferation.

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<p>2,5-Dimethoxy-4-methylamphetamine hydrochloride is a molecule that belongs to the class of phenethylamines. It has a serotonergic activity and can be used in the treatment of depression. This drug also affects the dopaminergic system and 5-HT2 receptors. 2,5-Dimethoxy-4-methylamphetamine hydrochloride is an agonist for 5HT1A receptors and an antagonist for 5HT2A and 5HT2C receptors. It has been shown to have a significant effect on locomotor activity in humans. The effects of this drug are dose dependent, with high doses leading to hallucinogenic effects.</p>