| Assay Method Information | |
| | Inhibition Assay |
| Description: | The PDE assay was performed according to a modified method referred to a report of Kotera et al. (Kotera et al., Biochem. Pharmacol., vol. 60, pp. 1333-1341, 2000), by the radiolabeled nucleotide method.Specifically, the measurements of the inhibitory activities were carried out in the following method.(Method) The test compounds were dissolved in dimethyl sulfoxide (DMSO). 2 uL of the compound solution was added to 96 well plate, and the reaction mixture (20 uL of PDE enzyme solution in 50 mM Tris-HCl, pH 8.0, 40 uL of the assay buffer (50 mM Tris-HCl, pH 8.0, 2 mM MgCl2, 0.07% 2-mercaptoethanol, and 0.825 mg/mL bovine serum albumin), and 20 uL of 1 mg/mL snake venom in 50 mM Tris-HCl, pH8.0) was added to the 96 well plate. The enzyme reaction was started by adding and mixing with substrate solution of 20 L containing approximate 35 nM 3H-cAMP in 50 mM Tris-HCl, pH 8.0. The final concentration of cAMP in the reaction mixtures was 7 nM. |
| Affinity data for this assay | |
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