| Assay Method Information | |
| | Inhibition Assay |
| Description: | BChE inhibitory activity determinations were carried out similarly by the method of Ellman et al., using 0.02 unit/mL of human serum BChE and 300 uM butyrylthiocholine, instead of AChE and acetylthiocholine, in a final volume of 300 uL. AChE inhibitory activity of compounds (Ia)-(Ie) and (-)-(Ib) and (+)-(Ib) was evaluated spectrophotometrically at 25° C. by the method of Ellman et al., using recombinant human AChE (hAChE) and Electrophorus electricus (ee) AChE and acetylthiocholine iodide as substrate (cf. G. L. Ellman et al., New and Rapid Colorimetric Determination of Acetylcholinesterase Activity Biochem. Pharmacol. 1961, vol. 7, pp. 88-95). For eeAChE inhibitory activity determination, the reaction took place in a final volume of 300 uL of 0.1 M phosphate-buffered solution pH 8.0, containing 0.03 unit/mL of ee AChE and 333 uM 5,5'-dithiobis(2-nitrobenzoic) acid (DTNB) solution used to produce the yellow anion of 5-thio-2-nitrobenzoic acid. Inhibition curves were performed in duplicates using at least 10 increasing concentrations of inhibitor and preincubating at 37° C. for 20 min. |
| Affinity data for this assay | |
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