Description; General description; Molecular Weight: 280 kDa Isoelectric Point: 5.5 Extinction Coefficient: E1% = 18.0 (280 nm) Acetylcholinesterase from Electrophorus electricus is a tetramer composed of 4 equal subunits of 70 kDa each. Each subunit contains one active site. The enzyme is a glycoprotein containing hexosamines.; Packaging; 500, 1000, 5000 units in glass bottle; Biochem/physiol Actions; Major degradative enzyme for acetylcholine in vivo. Converts acetylcholine + H2O to choline + acetic acid.; Caution; For dilute solutions (<1 mg/ml), add 1 mg/ml BSA to stabilize. Solutions containing at least 1 mg protein/ml in dilute neutral phosphate buffer are stable at least 6 months refrigerated.; Unit Definition; One unit will hydrolyze 1.0 μmole of acetylcholine to choline and acetate per min at pH 8.0 at 37 °C.; Physical form; Lyophilized powder containing Tris buffer salts; Analysis Note; The activity obtained using acetylcholine as substrate is 30-100 times that obtained with butyrylcholine, using acetylcholinesterase from electric eel.