Results 251 to 260 of about 69,441 (293)

Ubiquinol is superior to ubiquinone to enhance Coenzyme Q10 status in older men.

Food & Function, 2018
Coenzyme Q10 (CoQ10) exerts its functions in the body through the ability of its benzoquinone head group to accept and donate electrons. The primary functions are to relay electrons for ATP production in the electron transport chain and to act as an ...
Ying Zhang, Jin Liu, Xiaoqiang Chen, C. Oliver Chen   +3 more
semanticscholar   +1 more source

The Chemistry of Ubiquinone

1967
Publisher Summary This chapter describes the chemical knowledge of the ubiquinones. It discusses new results from studies of the biosynthesis of ubiquinone, some new data concerning the mass spectrometry of the ubiquinones. Mass spectrometry has proved to be extremely useful in this research. A study of the mass spectra of a series of ubiquinones and
Olsen Rk, Palle Friis, Karl Folkers, Daves Gd   +3 more
openaire   +3 more sources

On the biosynthesis of ubiquinone (50)

Archives of Biochemistry and Biophysics, 1959
Abstract It is shown that radioactive mevalonic acid is utilized for the synthesis of ubiquinone in the rat. 2,3-Dimethoxy-5-methyl-1,4-benzoquinone and dl -α-tocopherol are not precursors of the quinoid ring system. With progressive vitamin A depletion, the incorporation of mevalonic acid into ubiquinone of rat liver is enhanced.
U. Gloor, O. Wiss
openaire   +3 more sources

Current Advances on the Structure, Bioactivity, Synthesis, and Metabolic Regulation of Novel Ubiquinone Derivatives in the Edible and Medicinal Mushroom Antrodia cinnamomea.

Journal of Agricultural and Food Chemistry, 2017
In recent years, Antrodia cinnamomea has attracted great attention around the world as an extremely precious edible and medicinal mushroom. Ubiquinone derivatives, which are characteristic metabolites of A.
Bo-Bo Zhang, Pengcheng Hu, Jing Huang, Yong-Dan Hu, Lei Chen, Gan-rong Xu   +5 more
semanticscholar   +1 more source

Ubiquinone and Tocopherol in Birds

Nature, 1961
UNLIKE the rat and the rabbit, it seems from nutritional studies made by several groups of workers that the chicken needs little vitamin E, providing its diet contains an adequate supply of selenium and only limited amounts of unsaturated fat1–3. Since tissue-levels of ubiquinone in the rat4 and rabbit5 are high compared with those given for some other
J. Green, A. T. Diplock, E. E. Edwin, J. Bunyan   +3 more
openaire   +3 more sources

Ubiquinones and Ubichromenols in the Rat

Nature, 1960
UBIQUINONE, a naturally occurring quinone of considerable biological interest, was first isolated by Morton et al. 1, who found it in many kinds of animal tissue. Lester et al. 2 have shown that a series of such quinones exist, and have isolated, from different organisms, five compounds of general formula :
E. E. Edwin, A. T. Diplock, J. Green, S. Marcinkiewicz, J. Bunyan   +4 more
openaire   +3 more sources

Surface-Enhanced Infrared Spectroscopy and Neutron Reflectivity Studies of Ubiquinone in Hybrid Bilayer Membranes under Potential Control.

Langmuir, 2016
Surface-enhanced infrared adsorption spectroscopy (SEIRAS) and neutron reflectometry (NR) were employed to characterize ubiquinone (UQ) containing hybrid bilayer membranes.
A. Quirk, Michael J. Lardner, Zin-Min Tun, I. Burgess   +3 more
semanticscholar   +1 more source

Fluorogenic Ubiquinone Analogue for Monitoring Chemical and Biological Redox Processes.

Journal of the American Chemical Society, 2016
We report herein the synthesis and characterization of a fluorogenic analogue of ubiquinone designed to reversibly report on redox reactions in biological systems. The analogue, H2B-Q, consists of the redox-active quinone segment found in ubiquinone, 2,3-
L. E. Greene, R. Godin, G. Cosa
semanticscholar   +1 more source

Interaction of ubiquinone and vitamin K3 with mitochondrial succinate-ubiquinone oxidoreductase

Biochemical and Biophysical Research Communications, 1992
Two new methods have been devised for measuring fumarate reduction by beef heart succinate-ubiquinone oxidoreductase with quinols as electron donors. In one assay the quinone is maintained in the reduced state by coupling fumarate reduction with the DT-diaphorase reaction, in the other assay by the presence of excess dithionite. The advantages of these
Menahem Gutman, Menahem Gutman, Menahem Gutman, Brian A.C. Ackrell, Brian A.C. Ackrell, Alexander Kotlyar, Alexander Kotlyar, Alexander Kotlyar   +7 more
openaire   +3 more sources

Ferulenol specifically inhibits succinate ubiquinone reductase at the level of the ubiquinone cycle

Biochemical and Biophysical Research Communications, 2007
The natural compound ferulenol, a sesquiterpene prenylated coumarin derivative, was purified from Ferula vesceritensis and its mitochondrial effects were studied. Ferulenol caused inhibition of oxidative phoshorylation. At low concentrations, ferulenol inhibited ATP synthesis by inhibition of the adenine nucleotide translocase without limitation of ...
Ammar Zellagui, Pierre-Alain Carrupt, Salah Rhouati, Mesbah Lahouel, Didier Morin, Didier Morin, Roland Zini, Roland Zini   +7 more
openaire   +4 more sources