Abstract
1. 1. Uric acid uptake by erythrocytes of Beagle and Dalmatian dogs has been measured, using (2- 14C) uric acid. 2. 2. Uptake was characterized by a fast and a slow component. 3. 3. Urate uptake was inhibited by certain purine and pyrimidine derivatives and by anion transport inhibitors. It was dependent on intraerythrocyte glycolysis. 4. 4. Temperature only influenced uptake by the slow component ( Q 10 = 2.6). 5. 5. Urate uptake by the slow component is apparently due to the transport into the erythrocytes by facilitated diffusion ( K m = 6.6 mmol/l, V max = 390 μmol/l/min), whereas the fast component exhibits an adsorption of urate on erythrocyte surface. 6. 6. No difference of urate uptake by erythrocytes of Beagle and Dalmatian dogs has been observed.
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