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Assay Method Information

Assay Name:  Phosphodiesterase (PDE) Inhibition Assay
Description:  Phosphodiesterase activities were assayed in the presence of inhibitor compounds. Measurement takes advantage of the selective binding of 5-AMP or 5-GMP (and not cAMP or cGMP) to yttrium silicate beads with embedded scintillant. Hydrolysis is quantified by reading in a scintillation counter (Trilux, Wallac). The cAMP and cGMP concentrations used were far below the Km of PDE. Thus, the IC50s obtained are good approximation of Ki.
Affinity data for this assay
 

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Last update November 1, 2007
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