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  • Title: [Protein fractions and their enzymatic activity in the rat myocardium after a flight on the Cosmos-690 biosatellite].
    Author: Gaevskaia MS, Kolchina EV, Nosova EA, Kolganova NS, Veresotskaia NA.
    Journal: Kosm Biol Aviakosm Med; 1978; 12(5):12-5. PubMed ID: 692062.
    Abstract:
    Gamma-irradiation of rats in the ground-based experiment decreased the activity of aspartate aminotransferase of sarcoplasmatic proteins of the myocardium and increased the activity of adenosine triphosphate of myosin of the myocardium 1 and 26 days post-test. Gamma-irradiation of flight rats also reduced the activity of aspartate aminotransferase of sarcoplasmatic proteins of the myocardium; however, the activity of ATPase of myosin of the myocardium was lowered both 1 and 26 days postflight. It is suggested that irradiation-induced inhibition of synthetic processes delayed the synthesis of myosin with a normal activity and diminished the protein content in the T fraction of myocardium on the 1st postflight day.
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