Results 331 to 340 of about 129,619 (377)
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Liver microsomes and S9 from rainbow trout (Oncorhynchus mykiss): Comparison of basal‐level enzyme activities with rat and determination of xenobiotic intrinsic clearance in support of bioaccumulation assessment

Environmental Toxicology and Chemistry, 2009
Metabolism plays an important role in bioaccumulation of xenobiotics in fish. The applicability of trout liver microsomes and S9 fraction in bioaccumulation assessment of xenobiotics in fish was investigated in the present study.
X. Han   +4 more
semanticscholar   +1 more source

[30] Microsomal lipid peroxidation

1978
Publisher Summary This chapter discusses microsomal lipid peroxidation. Lipid peroxidation is a complex process known to occur in both plants and animals. It involves the formation and propagation of lipid radicals, the uptake of oxygen, a rearrangement of the double bonds in unsaturated lipids, and the eventual destruction of membrane lipids ...
Steven D. Aust, John A. Buege
openaire   +3 more sources

UDP glucuronosyltransferase and mixed function oxidase activity in microsomes prepared by differential centrifugation and calcium aggregation.

Acta Pharmacologica et Toxicologica, 2009
Microsomes were prepared from the liver, kidney and lung of phenobarbital or 20-methylcholanthrene treated and control rats with the conventional ultracentrifugation and calcium aggregation methods.
A. Aitio, H. Vainio
semanticscholar   +1 more source

Effect of storage and in vitro ischemia on the ultrastructure of microsomal membranes and on microsomal enzymes

Virchows Archiv B Cell Pathology, 1976
Pieces of liver (in vitro ischemia) and isolated microsomes were subjected to incubation at 4 degrees C and 37 degrees C for various time intervals. The effects on microsomal protein, phospholipids, and cholesterol and on microsomal phosphatases and electron transport enzymes were followed as a functional of time and temperature.
Hans Glaumann, Louis Marzella
openaire   +3 more sources

Oxidized redox state of glutathione in the endoplasmic reticulum.

Science, 1992
The redox state of the endoplasmic reticulum (ER) was measured with the peptide N-Acetyl-Asn-Tyr-Thr-Cys-NH2. The peptide diffused across cellular membranes; some became glycosylated and thus trapped within the secretory pathway, and its cysteine residue
C. Hwang, A. Sinskey, H. Lodish
semanticscholar   +1 more source

Cytochrome P450 2E1 and 2A6 enzymes as major catalysts for metabolic activation of N-nitrosodialkylamines and tobacco-related nitrosamines in human liver microsomes.

Carcinogenesis, 1992
An acetyltransferase-overexpressing strain of Salmonella typhimurium (NM2009) has been used to investigate roles of human liver microsomal cytochrome P450 (P450) enzymes in the activation of carcinogenic nitrosamine derivatives, including N ...
H. Yamazaki   +4 more
semanticscholar   +1 more source

Mitochondria and microsomes

1956
The spatial relationships of the myriad enzymes concerned in cell metabolism have assumed great significance in our efforts to understand the intergrated economy of the plant cell. During investigations into the intracellular distribution of enzymes, the biochemical activities of the mitochondria have been widely studied.
openaire   +2 more sources

[6] Preparation of microsomes with calcium

1978
Publisher Summary This chapter focuses on the preparation of microsomes with calcium. Isolation of the microsomal fraction of the hepatic cell employs a procedure of differential ultracentrifugation. This method is developed for mammalian liver tissue, but also employed to obtain microsomal fractions from a variety of tissues, such as lung, kidney ...
John B. Schenkman, Dominick L. Cinti
openaire   +3 more sources

Quantitative contribution of CYP2D6 and CYP3A to oxycodone metabolism in human liver and intestinal microsomes.

Drug Metabolism And Disposition, 2004
Oxycodone undergoes N-demethylation to noroxycodone and O-demethylation to oxymorphone. The cytochrome P450 (P450) isoforms capable of mediating the oxidation of oxycodone to oxymorphone and noroxycodone were identified using a panel of recombinant human
Bojan Lalovic   +4 more
semanticscholar   +1 more source

Characteristics of b-type cytochromes in brain microsomes: Comparison with liver microsomes

Archives of Biochemistry and Biophysics, 1984
Biochemical aspects of b-type cytochromes in swine cerebral microsomes were different from those of cytochrome b5 in liver microsomes, as well as the difference in absorption spectra. First, the kinetic constants, Km and Vmax, in rotenone-insensitive NADH-cytochrome c reductase activity were different from those of liver microsomes, and the activity of
Toshitsugu Yubisui   +2 more
openaire   +3 more sources

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