title: The role of superoxide anion radical in the reduction of ferritin iron by xanthine oxidase.
abstract: Superoxide dismutase exerted a pronounced inhibitory effect upon xanthine oxidase-mediated reduction of iron in ferritin, ferric chloride, or ferric ADP. Maximal inhibition was observed when the superoxide dismutase concentration was only about 1% of that found in normal porcine liver. These observations indicate that superoxide anion radical is an intermediate in the reduction of iron by xanthine oxidase in vitro but not in vivo.
authors.affiliation: Department of Medicine, University of Utah College of Medicine, Salt Lake City, Utah 84112, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Williams
authors.forename: G R
authors.initials: GR
authors.lastname: Lee
authors.forename: G E
authors.initials: GE
authors.lastname: Cartwright
mesh_terms: D000244:Adenosine Diphosphate / Q000031:analogs & derivatives* / Q000378:metabolism; D000818:Animals; D002712:Chlorides; D005290:Ferric Compounds / Q000378:metabolism; D005293:Ferritins / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D008099:Liver / Q000201:enzymology; D010084:Oxidation-Reduction; D013379:Substrate Specificity; D013482:Superoxide Dismutase / Q000378:metabolism; D013481:Superoxides / Q000378:metabolism*; D013552:Swine; D014969:Xanthine Oxidase / Q000378:metabolism*
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; C029936:adenosine diphosphate-ferric chelate; D013481:Superoxides; D000244:Adenosine Diphosphate; D005293:Ferritins; D007501:Iron; D013482:Superoxide Dismutase; D014969:Xanthine Oxidase; C024555:ferric chloride