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| | Fluorescence polarization (FP) Assay |
| Description: | To a NETN (20 mM Tris.HCl, 100 mM NaCl, 1 mM EDTA, 0.5% NP-40, 1 mM PMSF) buffer containing 200 μM ascorbic acid, 20 μM α-ketoglutaric acid, 100 μM FeCl2 was added FAM-HIF (556-575) at a final concentration of 1 μM in the dark. Subsequently, the desired concentration of the test compound or the positive compound was added (the compound was replaced by the buffer in the negative control and the positive control). Finally, PHD2 was added at a final concentration of 0.5 μg/μl (PHD2 was replaced by the buffer in the negative control). They were mixed well and allowed to stand at room temperature for 30 minutes in the dark followed by 95° C. water bath for 1 minute, and then the reaction was terminated. After the temperature drops to room temperature, the sample was prepared well for use. EBC buffer (50 mM Tris.HCl, 120 mM NaCl, 0.5% NP-40) was added to the corresponding wells of a black 96-well test plate. A GST-VBC complex was added to the corresponding test wells at a final concentration of 300 nM (using the wells containing only EBC buffer as blank wells). Subsequently, the corresponding PHD2 prolyl hydroxylation reaction sample was added in the dark as a substrate with a final concentration of 100 nM. After mixing well, the lateral and longitudinal fluorescence intensity values were measured using a full-wavelength multifunctional microplate reader (TECAN infinite M1000) at an excitation wavelength of 407 nm and an emission wavelength of 518 nm. |
| Affinity data for this assay | |
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