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B4186 Sigma-Aldrich

Butyrylcholinesterase human

vial of ≥4 units

Synonym: Acylcholine acyl-hydrolase, Choline esterase, butyryl, Pseudocholinesterase




Butyrylcholinesterase (BChE) may be used to hydrolyze large esters of choline such as butyrylcholine and benzoylcholine. Selective inhibition of BChE activity can be used in the detection of organophosphates. BchE may be used to treat organophosphate toxicity. It may be a useful tool in Alzheimer’s research. BchE, from Sigma, has been used to determine butyrylcholinesterase inhibition by various test compounds .

Biochem/physiol Actions

Butyrylcholinesterase (BChE) is a serine hydrolase that shares substantial structural similarities with acetylcholinesterase (AchE) but has different substrate and inhibitor specificities. BChE is found in the serum, hemopoietic cells, liver, lung, heart and the central nervous system of vertebrates.

Unit Definition

One unit will hydrolyze 1.0 μmole of butyrylcholine to choline and butyrate per min at pH 8.0 at 37 °C. The activity obtained using butyrylcholine as substrate is ~2.5 times that obtained using acetylcholine.

Analysis Note

Starting material individually donor tested and found negative for HIV I & II antibodies, Hepatitis B surfaceantigen, and Hepatitis C antibodies.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis


Certificate of Origin


Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products.Once you log onto our website, you will find the price and availability displayed on the product detail page.You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 orview local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
What amount of enzyme is present in 1 vial of Product B4186, Butyrylcholinesterase from human serum?
Each vial will contain at least 5 units.The vial content is given on the certificate of analysis of each lot. The vial may be substantially overpacked.
How should Product B4186, Butyrylcholinesterase from human serum, be reconstituted?
The enzyme can be reconstituted in 20 mM sodium phosphate buffer, pH 7.0, with 0.15 M sodium chloride.
Are any buffer salts present in Product B4186, Butyrylcholinesterase from human serum?
This product was lyophilized from 20 mM ammonium bicarbonate, which is a volatile buffer. So it would be expected to contain only traces of buffer salts.
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