| Assay Method Information | |
| | IMAP TR-FRET Assay |
| Description: | IMAP TR-FRET progressive binding system, FAM-cAMP substrate were from Molecular Devices (Sunnyvale, Calif.). The PDE IMAP assay was conducted in a 384-well black Greiner polypropylene plate (Sigma, St. Louis, Mo.). PDE inhibitors were serial diluted in 100% DMSO and dispensed into assay plate at 200 mL per well using Echo® Liquid Handling System from LABCYTE. Ten μL of PDE enzyme in IMAP reaction buffer (10 mM Tris-HCl, pH 7.2, 10 mM MgCl2, 0.05% NaN3, and 0.01% Tween-20) was added into the assay wells. The PDE enzyme concentration used was based on each lot of enzyme activity, to ensure enzyme reaction falls in a linear range under assay condition. 1.4 nM of PDE2 or 8 μM PDE10 were used in the assay system. Enzyme was pre-incubated with inhibitors for 60 minutes at room temperature before addition of 10 uL of substrate addition, which results in 100 nM of FAM-cAMP in the reaction. |
| Affinity data for this assay | |
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