Membranes from guinea-pig lung exhibited high-affinity binding of [3H]dipyridamole, a potent inhibitor of nucleoside transport. Binding (apparent KD 2 nM) was inhibited by the nucleoside-transport inhibitors nitrobenzylthioinosine (NBMPR), dilazep and lidoflazine and by the transported nucleosides uridine and adenosine. In contrast, there was no detectable high-affinity binding of [3H]dipyridamole to lung membranes from the rat, a species whose nucleoside transporters exhibit a low sensitivity to dipyridamole inhibition. Bmax. values for high-affinity binding of [3H]dipyridamole and [3H]NBMPR to guinea-pig membranes were similar, suggesting that these structurally unrelated ligands bind to the NBMPR-sensitive nucleoside transporter with the same stoichiometry.
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Research Article| December 15 1986
[3H]dipyridamole binding to nucleoside transporters from guinea-pig and rat lung
Biochem J (1986) 240 (3): 879–883.
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M M Shi, J D Young; [3H]dipyridamole binding to nucleoside transporters from guinea-pig and rat lung. Biochem J 15 December 1986; 240 (3): 879–883. doi: https://doi.org/10.1042/bj2400879
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