A series of dinucleoside 5-polyphosphates Up(n)U (n = 2-7) was synthesized.
Their relative potencies as agonists at the G-protein-coupled receptors P2
Y(1), P2Y(2), P2Y(4), and P2Y(6) were determined by intracellular calcium m
easurements using fluorescent imaging techniques. The correlation of phosph
ate chain length to activities at these receptors is discussed. (C) 2001 El
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