Results 271 to 280 of about 66,565 (306)

Regulation of ubiquinone metabolism

Free Radical Biology and Medicine, 2000
Interest in ubiquinone (UQ) has increased during recent years, mainly because of its antioxidant function and its use as a dietary supplement. However, our knowledge of the biosynthesis, catabolism, and regulation of this lipid in mammalian tissues is quite limited.
G, Dallner, P J, Sindelar
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Biosynthesis of Ubiquinone

1983
Publisher Summary This chapter discusses the biosynthesis of ubiquinone. Ubiquinone serves as a lipid-soluble electron carrier in the membrane-bound electron transport chains of both prokaryotes and eukaryotes. Eighty-five percent of cell ubiquinon is located in the mitochondria or equivalent membrane system.
R E, Olson, H, Rudney
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Ubiquinone in the retina

Vision Research, 1968
Abstract Microspectrophotometric examination of retinal cells shows an absorbance maximum at 282 nm and a shoulder at 275 nm, the latter possibly due to ubiquinone. Extraction of bovine retinal cell outer segments and retinal cells free of outer segments, however, failed to reveal any ubiquinone; an upper limit of 0.6 n mole ubiquinone per eye being ...
G, Entine, P A, Liebman, B T, Storey
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Rush desensitization with ubiquinone

Allergy, 1997
UBIQUINONE
Schiavino, Domenico, Nucera, Eleonora, Zoppi, Adriana, Misuraca, C, Patriarca, Giampiero   +4 more
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[Ubiquinones].

Nihon rinsho. Japanese journal of clinical medicine, 1993
Recent topics on the biochemical and clinical aspects of ubiquinone are reviewed in this paper. Dallner and his colleagues have demonstrated that ubiquinone is synthesized, not only in mitochondria, but also on the endoplasmic reticulum-Golgi system of the rat liver.
T, Okamoto, T, Takahashi, T, Kishi
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Kinetics of ubiquinone reduction by the resolved succinate: Ubiquinone reductase

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1982
A significant lag in the thenoyltrifluoroacetone (TTFA)-sensitive succinate: ubiquinone reductase activity was observed when a ubiquinone-deficient resolved preparation of the enzyme was assayed in the presence of exogenous ubiquinone-2 (Q2) and 2,6-dichlorophenolindophenol.
V G, Grivennikova, A D, Vinogradov
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Protein-Ubiquinone Interaction: Synthesis and Biological Properties of Ethoxy Ubiquinone Derivatives

Biochemistry, 1994
For investigation of the protein-ubiquinone interaction in the succinate-cytochrome c reductase region of the bovine heart mitochondrial electron-transport chain, ethoxy-substituted ubiquinone derivatives, 2-ethoxy-3-methoxy- or 3-ethoxy-2-methoxy-5-methyl-6-decyl-1,4-benzoquinone (EtOQ0C10) and 2,3-diethoxy-5-methyl-6-decyl-1,4-benzoquinone [(EtO ...
D Y, He, L Q, Gu, L, Yu, C A, Yu
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An ubiquinone-binding protein in mitochondrial NADH-ubiquinone reductase (complex I)

Biochemical and Biophysical Research Communications, 1986
An ubiquinone-binding protein (QP) was purified from mitochondrial NADH-ubiquinone reductase (Complex I). Complex I was separated into 3 fragments: a fraction of hydrophobic proteins, that of soluble iron-sulfur protein (IP) and soluble NADH dehydrogenase of flavoprotein by a procedure involving the resolution with DOC and cholate, followed by ethanol ...
H, Suzuki, T, Ozawa
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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
A B, Kotlyar, M, Gutman, B A, Ackrell
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