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| | Homogenous Time-Resolved Fluorescence Resonance Energy Transfer (TR-FRET) Technology |
| Description: | The phosphodiesterase assay was developed using the LANCE cAMP kit (PerkinElmer). The assay buffer contained HBSS with 5 mM HEPES, 0.1% BSA, and 1.5 mM MgCl2, pH 7.4. PDE10A (BPS Bioscience) was used at 200 pg/well (with a specific activity of 3200 pmole/min/μg with assay conditions: 10 mM Tris-HCl, pH 7.4, 10 mM MgCl2, 1 mM MnCl2, 200 μM cAMP, 2.5 kU 5′ nucleotidase, 37° C., 20 min) and PDE4D3 (BPS Bioscience) was used at 100 pg/well (with a specific activity of 32713 pmole/min/μg with assay conditions: 10 mM Tris-HCl, pH 7.4, 10 mM MgCl2, 1 mM MnCl2, 200 μM cAMP, 2.5 kU 5′ nucleotidase, 37° C., 20 min). The Biotin-cAMP tracer, supplied in 10 mmol/L Tris-HCl buffered (pH 8.0) salt solution with 1 mmol/L ethylenediaminetetraacetic acid (EDTA), 0.1% bovine serum albumin (BSA), and 0.05% sodium azide, is used at a dilution of 1/375. The assay detection mixture contained the LANCE Eu-W8044 labeled streptavidin 1/2250 (supplied in 50 mmol/L Tris-HCl buffered (pH 7.8) salt solution with 0.9% sodium chloride (NaCl), 0.1% BSA, and 0.05% sodium azide) and the Alexa Fluor 647-anti cAMP antibody 1/200 (supplied in 50 mmol/L Tris-HCl buffered (pH 7.8) salt solution with 0.9% NaCl, 0.1% BSA, and 0.05% sodium azide). Chemical compounds were dissolved in DMSO (final concentration 2% (v/v)). |
| Affinity data for this assay | |
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