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  • Title: Effect of thrombin on the radioactive nucleotides of human washed platelets.
    Author: Ireland DM.
    Journal: Biochem J; 1967 Nov; 105(2):857-67. PubMed ID: 5584022.
    Abstract:
    Radioactive ATP and ADP were found in platelets after incubation of human platelet-rich plasma with either [8-(14)C]adenosine or [8-(14)C]ADP. Treatment of the labelled and washed platelets with thrombin indicated that, though considerable amounts of ATP and ADP were released to the supernatant, radioactive ATP and ADP remained predominantly in the cellular fraction. Breakdown of radioactive ATP took place to form mainly IMP and hypoxanthine, the latter compound appearing in the supernatant. The results indicate the presence of at least two pools of nucleotide in platelets. Evidence is given that the two pools contain approximately the same amounts of ATP plus ADP, and that the ratio of ATP to ADP in the pool released to the supernatant by the action of thrombin is about 0.7-0.8.
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