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Comprehensive Identification of Cytochrome P450 Isoforms from Solubility-Based Fractionated Rat Liver Microsomes

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Cytochrome P450 isoforms from male rat liver microsomes were comprehensively identified using nano liquid chromatography tandem mass spectrometry (nanoLC-MS/MS). The enrichment of P450, an endomembrane-anchored heme protein, was achieved by solubility-based protein fractionation, and greatly improved the total number of identified P450 isoforms. LC-MS/MS analysis of fractions resulted in the identification of total 36 P450 isoforms. The combination of proteomic analysis and the solubility-based fractionation would provide powerful tool for the expression analysis of the superfamily proteins having great similarities between the amino acids sequences.

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Keywords: Drug metabolism; P450 isoforms; membrane proteins; rat liver microsome

Document Type: Research Article

Publication date: December 1, 2007

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  • Drug Metabolism Letters publishes short papers on major advances in all areas of drug metabolism and disposition. The emphasis will be on publishing quality papers very rapidly. Letters will be processed rapidly by taking full advantage of the Internet technology for both the submission and review of manuscripts. The journal covers the following areas:

    In vitro systems including CYP-450; enzyme induction and inhibition; drug-drug interactions and enzyme kinetics; pharmacokinetics, toxicokinetics, species scaling and extrapolations; P-glycoprotein and transport carriers; target organ toxicity and interindividual variability; drug metabolism and disposition studies; extrahepatic metabolism; phase I and phase II metabolism; recent developments for the identification of drug metabolites, reactive intermediate and glutathione conjugates.
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