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C8946 Sigma-Aldrich

α-Chymotrypsin from human pancreas

lyophilized powder

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Properties

Related Categories 3.4.x.x Peptidases, 3.x.x.x Hydrolases, Application Index, Biochemicals and Reagents, Chymotrypsin, alpha-,
form   lyophilized powder
mol wt   25 kDa
packaging   vial of ≥10 BTEE units
storage temp.   −20°C
Gene Information   human ... CTRB1(1504)

Description

General description

α-Chymotrypsin belongs to the trypsin family of serine proteases. It is secreted as an inactive precursor chymotrypsinogen to the intestine. The cleavage of peptide bond at amino acid 148 forms α-chymotrypsin. Chymotrypsinogen is encoded by the gene CTRB1 and is mapped to 16q23.1 in the human chromosome.

Application

Human α-chymotrypsin has been used in a study to assess the quantitative structure-activity relationships for organophosphates binding to trypsin and chymotrypsin. Human α-chymotrypsin has also been used in a study to investigate the direct detection of native proteins in biological matrices using extractive electrospray ionization mass spectrometry.

α-Chymotrypsin from human pancreas has been used to test inhibition by N-alkyl isatins against mammalian serine proteases.

Biochem/physiol Actions

A serine protease that hydrolyzes peptide bonds with aromatic or large hydrophobic side chains (Tyr, Trp, Phe, Met) on the carboxyl end of the bond.

Unit Definition

One unit will hydrolyze 1.0 μmole of BTEE per min at pH 7.8 at 25°C.

Analysis Note

Protein determined by A1%/280

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
1
RTECS 
GC3050000

Documents

Certificate of Analysis

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Certificate of Origin

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Protocols & Articles

Protocols

Procedure for Enzymatic Assay of α-Chymotrypsin (EC 3.4.21.1)

This procedure may be used for the determination of α‑Chymotrypsin activity using N-Benzoyl-L-tyrosine ethyl ester (BTEE) as the substrate. It is not to be used to assay α‑Chymotrypsin agarose (Catal...
Keywords: Extinction coefficient

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Metabolomics, Molecular biology

Peer-Reviewed Papers
15

References

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