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Activity of DNA-dependent DNA polymerase and aspartate--carbamoyl transferase after separation of rat marrow and spleen cells in an albumin density gradient under normal conditions, after irradiation and administration of DNA. [Gamma radiation]

Journal Article · · Radiobiology (USSR) (Engl. Transl.); (United States)
OSTI ID:5166723
Normal rat bone marrow and spleen cells, and cells taken at different times following irradiation (600 R) and administration of DNA were separated into nine fractions in an albumin density gradient. Radiation lowered DNA-dependent DNA polymerase and aspartate-carbamoyl transferase activity in cells of the fractions in which it was normally the highest. There was restoration of distribution of cells according to levels of enzymatic activity on the 15th to 20th post-radiation day. Administration of DNA did not affect the nature of postradiation changes in distribution of enzyme activity, but normalized DNA content in some fractions of bone marrow cells on the 5th, rather than 10th to 20th postradiation day.
OSTI ID:
5166723
Journal Information:
Radiobiology (USSR) (Engl. Transl.); (United States), Journal Name: Radiobiology (USSR) (Engl. Transl.); (United States) Vol. 17:5; ISSN RADBA
Country of Publication:
United States
Language:
English