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P8038 Sigma

Proteinase, bacterial

Type XXIV, 7.0-14.0 units/mg solid, lyophilized powder

Synonym: Alkaline Protease, Protease from Bacillus licheniformis, Proteinase from Bacillus licheniformis, Subtilo peptidase A



Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Analysis Note

Amino acid analysis and isoelectric focusing electrophoresis consistent with subtilisin Carlsberg.


1 g in glass bottle

50, 100, 250 mg in glass bottle


Subtilisin A is a member of the Serine S8 Endoproteinase family. It has broad specificity with a preference for a large uncharged residue in the P1 position. It hydrolyzes native and denatured proteins, and is active under alkaline conditions.

Unit Definition

One unit will hydrolyze casein to produce color equivalent to 1.0 μmole (181 μg) of tyrosine per min at pH 7.5 at 37 °C (color by Folin-Ciocalteu reagent).


The enzyme from Sigma has been used to optimize release of all mitochondrial populations from homogenized ventricular tissue of rat heart. It has also been used in the pre-hybridisation treatment of formalin fixed, paraffin wax-embedded liver specimens for detecting human and viral DNA.

This is a proteolytic enzyme isolated from the fermentation of Bacillus licheniformis. It is a serine endoproteinase with a broad specificity towards native and denatured proteins, and is active under alkaline conditions. Product P8038, also known as Subtilisin Carlsberg, has been used to hydrolyze cardiac cells to study the silencing of cardiac mitochondrial NHE1.

Biochem/physiol Actions

Proteinase catabolizes proteins by hydrolysis of peptide bonds. Proteases are inactivated by serine active-site inhibitors, such as phenylmethylsulfonyl fluoride (PMSF) and diisopropylfluorophosphate .

Physical properties

Subtilisin is a non-glycosylated single polypeptide chain without disulfide bonds and has a molecular weight of 27 KDa.

Protocols & Applications

Non-specific Protease Activity Assay Video

Price and Availability

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Personal Protective Equipment 
UN 3082 9 / PGIII
WGK Germany 
Protocols & Articles


Enzymatic Assay of Protease Using Casein As a Substrate

To standardize a procedure for the enzymatic assay of Protease using Casein as a substrate at Sigma-Aldrich St. Louis.

Related Content

Enzymes & Proteins

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

Peer-Reviewed Papers


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