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In vitro experiments on effects of selective x radiation on catalase activity

Journal Article · · Radiobiology (USSR) (Engl. Transl.); (United States)
OSTI ID:5389366
; ;
The hypothesis of special radiosensitivity of heme-containing enzymes, which are involved in and determine processes of energy metabolism, has been expounded. It has been demonstrated that when heme-containing enzymes are exposed to radiation substantial conformational changes occur in their molecule. This was demonstrated on hemoglobin, cytochromes, and catalase. Catalase is directly involved in processes of conjugated oxidative phosphorulation, and it is a radiosensitive enzyme. One can use the characteristic radiation of x rays, emitted by the nickel and iron anode, for direct proof of vulnerability of iron. The data indicate that irradiation with the nickel anode induces more profound change in catalase activity than with the iron anode. The energy of characteristic radiation emitted by the nickel anode was found to be more effective because, in addition to the general deleterious effect of penetrating radiation on these objectives, there was also the selective effect on the atom of iron contained in the active center of heme-containing enzymes. (ERB)
Research Organization:
Leningrad Inst. of Chemicopharmaceuticals, USSR
OSTI ID:
5389366
Journal Information:
Radiobiology (USSR) (Engl. Transl.); (United States), Journal Name: Radiobiology (USSR) (Engl. Transl.); (United States) Vol. 18:3; ISSN RADBA
Country of Publication:
United States
Language:
English

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Related Subjects

560111* -- Radiation Effects on Biochemicals-- In Vitro-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CATALASE
DATA
DATA FORMS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY DEPENDENCE
ENZYME ACTIVITY
ENZYMES
EXPERIMENTAL DATA
IN VITRO
INFORMATION
IONIZING RADIATIONS
IRON
IRRADIATION
ISOLATED VALUES
METALS
NUMERICAL DATA
OXIDOREDUCTASES
RADIATION EFFECTS
RADIATIONS
RADIOSENSITIVITY
TRANSITION ELEMENTS
X RADIATION