| Assay Method Information | |
| | Diamine oxidase (DAO) selectivity assay |
| Description: | Promega ROS-Glo H2O2 Assay Kit, 50 ml. Cat No. G8821Inhibitors (Test compounds):10 mM stock diluted to 10, 3, 1, 0.3, 0.1, 0.03, 0.01, 0.003, 0.001, and 0.0003 mM in drug plate, resulting in a concentration of 100, 30, 10, 3, 1, 0.3, 0.1, 0.03, 0.01, and 0.003 uM in the assay.Positive Control (Aminoguanidine):1 mM stock diluted to 1 to 0.0001 and 0.00003 mM in drug plate, resulting in a concentration of 3 to 0.001 and 0.0003 uM in the assay.DAO:DAO batch is obtained from Sigma Enzyme is reconstituted in sodium phosphate buffer at 10 mg/mLAssay Plates: 96 well white polystyrene, flat bottom plates: Fisher, Cat No. DPS-134-050AProcedure:1. Dilute 400 ul DAO enzyme in 4 mL Assay Buffer (enough for one plate). Add 40 ul DAO enzyme to all wells (excluding G+H 12, assay buffer only)3. Add 0.5 μl test compound serial dilutions, in duplicate4. Add 0.5 μl serial dilutions of Aminoguanidine down column 11 and to E+F 125. Add 0.5 μl DMSO (100% activity control) to C+D 126. Cover plate and incubate for 20 minutes at room temp on a plate shaker7. Prepare Start Mix:Volume Reagent 1 x plate 2 x plate Final ConenAssay Buffer 2 ml 3 ml 8.5M Cadaverine 23 μl 34.5 μl 97.8 mMH2O2 Substrate (1:80) 25 μl 37.5 μl 125 μM8. Add 10 μl Start Mix to all wells9. Incubate for 60 min at room temp on a plate shaker10. Prepare Detection Reagent:VolumeReagent 1 x plate 2 x plateLuciferin 5 ml 10 mlD-cysteine (1:100) 50 μl 100 μlSignal Enhancer (1:100) 50 μl 100 μl11. Add 50 μl Detection Regent to each well EXCEPT No Luciferin controls (A+B 12, add 50PI assay buffer)12. Incubate for 20 min at room temp on a plate shaker, protected from light13. Measure luminescence using a plate reader (integration 500 ms)Values for the blank (no DAO controls) are subtracted from all samples. |
| Affinity data for this assay | |
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