S-Butyrylthiocholine iodide is a widely used chromogenic substrate analog for the detection of cholinesterase activity, particularly butyrylcholinesterase (BChE). It is structurally similar to natural choline esters and is hydrolyzed by cholinesterases to produce thiocholine, which can be subsequently detected using chromogenic reagents.
In typical assays, the released thiocholine reacts with 5,5'-dithiobis(2-nitrobenzoic acid) (DTNB) to generate a yellow-colored product (TNB), enabling quantitative detection via spectrophotometry.
Due to its reliability and sensitivity, this compound is widely used in enzyme activity assays, clinical diagnostics, neurobiology research, and inhibitor screening, especially in studies involving cholinesterase function and regulation.
S-Butyrylthiocholine iodide functions as a substrate for cholinesterases.In enzymatic reactions:
This compound is widely used for quantitative measurement of cholinesterase activity.Typical applications include:
It is commonly used in screening of cholinesterase inhibitors.Applications include:
The compound is important in studies involving cholinergic signaling.Applications include:
Widely used in clinical biochemistry and diagnostics.Applications include:
| Parameter | Recommended Conditions |
| Detection Method | DTNB-based colorimetric assay (Ellman method) |
| Detection Wavelength | 412 nm |
| Buffer Systems | Phosphate buffer, Tris-HCl buffer |
| Temperature | 25–37 °C |
| Assay Format | Spectrophotometric assays, microplate assays |
Optimization may be required depending on enzyme source and assay design.
Keep container tightly closed in a dry and well-ventilated place
Keep in a cool place
Recommended storage temperature -20 °C
Store under inert gas
Hygroscopic
Moisture sensitive
Light sensitive
Researchers working in the following fields may benefit from this compound:
What is S-Butyrylthiocholine iodide used for?
It is used as a substrate for measuring cholinesterase activity, especially BChE.
How is enzyme activity detected?
Through reaction with DTNB, producing a yellow-colored TNB product measured at 412 nm.
Can it be used for inhibitor screening?
Yes, it is widely used in screening cholinesterase inhibitors in drug discovery and toxicology studies.
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