title: [Thiol-dependent generation of superoxide radical induced by menadione and vicasol].
abstract: It was demonstrated that in the presence of blood serum menadione and vicasol reduce cytochrome c in two ways, i. e., via O2-. -dependent and O2-. -independent routes. T ability of the serum to generate O2-. in the presence of menadione is retained after dialysis. Albumin can also act as an electron donor during O2-. generation mediated by menadione; however, this ability of the serum does not correlate with the presence of albumin in it. N-Ethylmaleimide and Cu2+ inhibit the ability of albumin and blood serum to induce menadione-mediated generation of O2-. It is concluded that in the presence of thiol-containing proteins and O2-. vitamin K3 forms an oxidative system generating O2-.
mesh_terms: D003574:Cytochrome c Group / Q000097:blood / Q000378:metabolism*; D004579:Electron Transport; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D010084:Oxidation-Reduction; D013438:Sulfhydryl Compounds / Q000097:blood / Q000378:metabolism*; D013481:Superoxides / Q000378:metabolism*; D014812:Vitamin K / Q000031:analogs & derivatives* / Q000494:pharmacology*; D024483:Vitamin K 3
chemical_list: D003574:Cytochrome c Group; D013438:Sulfhydryl Compounds; D013481:Superoxides; D014812:Vitamin K; D024483:Vitamin K 3
vernacular_title: Tiolzavisimoe obrazovanie superoksidnogo radikala menadionom i vikasolom.