Acetylcholinesterase from Electrophorus electricus (electric eel)

Molecular Weight: 280 kDa
Isoelectric Point: 5.5
Extinction Coefficient: E^1% = 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.

Acetylcholinesterase from Electrophorus electricus (electric eel) has been used:

• in acetylcholinesterase activity assay
• to study its effects on Xenopus embryonic hippocampal cells
• to study the effect of acetylcholine inhibitors on development and plasticity

Acetylcholinesterase (AChE) exhibits its activity against acetylcholine in the neuromuscular junctions and synaptic cleft of cholinergic neurons. It participates in the nitric oxide signaling pathway.

Major degradative enzyme for acetylcholine in vivo. Converts acetylcholine + H₂O to choline + acetic acid.

Lyophilized powder containing Tris buffer salts

The activity obtained using acetylcholine as substrate is 30-100 times that obtained with butyrylcholine, using acetylcholinesterase from electric eel.

One unit will hydrolyze 1.0 μmole of acetylcholine to choline and acetate per min at pH 8.0 at 37 °C.

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.