Amines amino acid oxidation

Nitric oxide, a gas, is an improbable compound for a neurotransmitter. It is not an amine, amino acid, or peptide it is not stored in synaptic vesicles or released by... 

Amino acids can also undergo oxidative de-amination. Amino-acid oxidases use FAD as coenzyme and the reduced FAD produced is oxidised by 02 ... 

Pyrroles are common products in the reaction of different lipid oxidation products with primary amino groups of amines, amino acid, and protein (Zamora et al., 2000). For example, when squid microsomes were oxidized with iron and ascorbate, TEARS increased simultaneously with the -value (yellowness) and pyrrole compounds, concomitantly with a decrease in free amines. Off-color formation in squid muscle could be due to the nonenzymatic browning reactions occurring between aldehydic lipid oxidation products and the amines on phospholipids head groups... 

Amino acids. Oxidation of aliphatic primary amines with ruthenium tetroxide leads to complex products. However, oxidation of aralkylamines at pH 3.0 with periodate (12 eq.) and RuCls 3H2O (0.02 eq.) converts the aromatic ring into a carboxyl group to give amino acids. Cleavage is facilitated by a 4-methoxy or hydroxy substituent in the ring. ... 

There are many organic retarder of setting (see Table 4.3). Among them the lig-nosulphonates, hydroxyl-carboxylic and carboxylic acids arrd their salts, amines, amino acids, carbohydrates of general formula C (H20), and the products of their oxidation that is acids and their salts can be mentioned. 

Ruthenium complexes need a strong reductant or oxidant for chemiluminescent reactions of type (b) and (c) above. These reactive compounds are usually radicals derived from simple organic compounds such as amines, amino acids, the reduced form of )S-nicotinamide adenine dinucleotide (NADH), and some antibiotics. Analytical procedures have been developed for some of these compounds on this basis, e.g., for tripropylamine, which gives a detection limit of 2 X 10 moll. ... 

Compounds that may be determined by nonaqueous titrimetry include amines, amino acids, phenols, and Schiff s bases. Carbonyl compounds (by oxidation and titration of the released H ) can also be determined. Such titrations are especially useful in the pharmaceutical industry. 

Complex mixtures are produced by non-enzymatic browning reactions between thermally oxidized lipids and amines, amino acids and proteins (see Chapter 11.B.4). Interactions between aldehydes, epoxides, hydroxy ketones, and dicarbonyls with proteins cause browning that has been related with losses of lysine, histidine, and methionine. Schiff base formation results in polymerization to form brown macromolecules. Interactions between epoxyalkenals formed at elevated temperatures and reactive groups of proteins produce protein pyrroles polymers and volatile heterocyclic compounds. Much of the published research in this complex chemical area was based on model systems. More stmctural information is needed however with real foods subjected to frying conditions. 

Chapter 12 on Frying contains new material on complex interaction compounds produced by non-enzymatic browning reactions between thermally oxidized lipids and amines, amino acids and proteins. This chapter... 

The direct oxidation of amino acids (oxidative deamination) is insignificant compared to transamination. Decarboxylation is important only for some special metabolic processes. Serine, e.g., is transformed to ethanolamine, one of the major components of the phosphatides. Similarly, cysteine can become /3-mercaptoethyl-amine, a constituent of coenzyme A. Decarboxylation also plays a role in the formation of certain hormones (cf. Chapt. VIII-5). 

Oxidation of the hydroxyl group, after protection of the amine group by ben2oylation, gives amino acids (7), eg, oxidation of 2-amino-2-methyl-l-propanol to 2-methylalanine [62-57-7] (CH )2CNH2COOH. 

Cadmium complexes acety(acetone, 2, 372 alcohols, 5, 964 amides, 5,944 amine oxides, 5,964 amines, 5,933 amino acids, 5, 938... 

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