Postradiation disturbances in functioning of Ca(2+)- and cyclic nucleotide-dependent protein kinase systems are established. Kinetic index of different protein kinases of spleen lymphocytes under irradiation with doses of 0.5 and 1 Gy are analysed using return-cards-construction and Lyapunov's-coefficient-determination methods. It is shown that determined disturbances can be considered as a part of general unspecific adaptational reaction of lymphocytes to irradiation.
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