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Updated: Aug 17, 2026

Cellular Lipid Extraction for Targeted Stable Isotope Dilution Liquid Chromatography-Mass Spectrometry Analysis
Published on: November 17, 2011
Lactoperoxidase-catalyzed oxidation of [4-14C]estradiol
Abstract:
The conversion of [4-14C]estradiol to water-soluble products by lactoperoxidase (EC 1.11.1.7) in the presence of added or generated H2O2 was studied using albumin or tyrosine as acceptor. The enzyme was able to catalyze the oxidation and binding of estradiol to albumin even in the absence of 2,4-dichlorophenol at very low concentrations of hydrogen peroxide. Other systems in which H2O2 was replaced by oxygen and Mn2+, light-sensitized riboflavin or glutathione was also shown to be active in the conversion of estradiol to water-soluble products and the effect of inhibitors on these reactions was investigated. Possible mechanisms for the peroxidase-catalyzed formation of these estradio metabolites are discussed.
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