منابع مشابه
Substrate specificity of soybean lipoxidase.
Purified soybean lipoxidase was used to test the substrate specificity of all cis,ck-methylene-interrupted isomers of linoleic acid. The natural 9, U-isomer was found to be the best substrate, and the 13,16-isomer 50% as effective. The presence of calcium ions broadened the pattern of specificity. The rates of reaction of a series of polyunsaturated acids in which chain length, number of double...
متن کاملDetermination of Lipoxidase in Wheat Germ
Lipoxidase in wheat germ affects the wheat germ’s quality and must be inactivated for processing. Because no method was available for measuring unpurified lipoxidase in wheat germ, methods for measuring purified lipoxidase or lipoxidase in soybean were used as reference methods. These methods proved to be so inaccurate that the natural state of the wheat germ could not be determined. A simple m...
متن کاملThe reaction mechanism of soy bean lipoxidase.
Based on their observations that the lipoxidase-catalyzed oxidation of linoleate, like autoxidation, gave primarily conjugated diene peroxides (1,2) and caused a coupled oxidation of some easily oxidizable substances, such as carotenoids (3) and antioxidants (4), Bergstrom and Holman proposed a reaction mechanism for lipoxidase catalysis. They suggested (4) that lipoxidase could cause initiatio...
متن کاملThyroxine degradation during lipoxidase-catalyzed peroxidation of linoleic acid.
The possibility has been examined that thyroxine may be degraded by an intermediate free radical in the oxidation of linoleate catalyzed by lipoxidase. Such a reaction has been observed and the lipid radical with which thyroxine reacts is suggested to be enzyme attached RO; proposed by Tappel (in W. 0. LUIVDBERG (Editor), A&oxidation and antioxidants, Vol. I, Interscience Publishers, New York, ...
متن کاملOxidation of 2,3',6-Trichloroindophenol by the Lipoxidase System.
22. MICHAELIS, L. Bio'ogical oxidations and reductions. Ann. Rev. Biochem. 16: 1-34. 1947. 23. POWERS, W. H., LEWIS, S., and DAWSON, C. R. The properties and preparation of a highly purified ascorbic acid oxidase. Jour. Gen. Physiol. 27: 167-180. 1944. 24. STEINMAN, H. G. and DAWSON, C. R. On the mechanism of the ascorbic acid-ascorbic acid oxidase reaction. The hydrogen peroxide question. Jour...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1947
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.01-0571