Intravenous injection of 1 microg/kg desmopressin to rabbits not only accelerated clotting of arterial blood (maximally by 59.16 +/- 8.53% after 1 h), but also increased the number of microvesicles containing the integral enzyme 5'-nucleotidase in the arterial blood from the initial level of 36.26 +/- 8.08 ncat/liter to a maximum of 99.65 +/- 15.8 ncat/liter after 15 min.
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