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Kex2 Protease
Kex2 Protease
Origin of place China
Model powder
Supplier ShangHai YaXin Biotechnology Company
Price $142/0.5U
Hits 299
Update 2/11/2018
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Recombinant Kex2 Protease  

Catalog Number: Re15


Synonyms: Endoproteinase Lys/Arg-Arg; Kex2 Protease;YSCF Protenase

Source: Recombinant Kex2 Protease is a genetically engineered protein expressed in Pichia pastoris

Storage temperature: 2-8鈩

Protein Sequence:The amino acid sequence of recombinant Kex2 Protease is identical to Saccharomyces cerevisiae Kex2



Kex2 is a Ca2+ dependent serine protease and cleaves at C-terminal site of Lys-Arg, Arg-Arg, Pro-Arg in pro-α-factor and killer-toxin precursors maturing.But Kex2 can’t recognize and cut a single basic amino acid,such as carboxyl end peptide bond of arginine and lysine. Recombinant Kex2 protease is a genetically engineered protein expressed in Pichia pastoris and with equivalent properties compared to native Saccharomyces cerevisiae Kex2. The activity of Kex2 is not affected by the conventional serine protease inhibitors such as PMSF,TPCK,TLCK inhibition.The optimal pH of Kex2 protease is 9.0. It is stable in buffer (pH 5.0-6.0).




Pichia pastoris


White or off white powder

Specific activity

≥5.0 units/mg pro.


Single major band

Molecular Weight(SDS-PAGE)

24.0±2.4 kDa

UNIT DEFINITION: One unit of Kex2 activity will release 1μmol 4-nitroaniline per minute in a reaction volume of 3.0 ml at pH8.0 and 25鈩 with Boc-QRR-pNA (Boc-Gln-Arg-Arg-pNA) as the substrate.



Recommended reaction buffer: pH 7.0-9.0, 50 mM Tris-HCl,2 mM Ca2 + or HEPES, 5 mM Ca2 +. If it is not used immediately after dissolving, it is recommended to dissolve the powder with 20 mM (pH 5.2) NaAc-HAc and 2 mM Ca2 + buffer to make the final concentration is about 1-10 mg/ml,then make suitable packing as your requirement and store at -20鈩.Reaction was carried out, using pH 7.0-9.0, 50 mM Tris-HCl, 2 mM Ca2 + or HEPES, 5 mM Ca2 + buffer.

Note: The optimum reaction pH of the enzyme is pH 9.0 and the optimum stable pH is 5.0-6.0.



Stability of storage:Recombinant kex2 protease should be stored under 2-8鈩 in sealed container.

It is stable within 6 months.After dissolved with 20mM NaAc-HAc,pH 5.2,2mM Ca2+,it should be stored under -20鈩.

It is no activity loss after 5 times repeated freezing and thawing.

Stability of transport:The product is stable by blue ice insulation transport.



Animal origin free:Recombinant Kex2 protease is no exogenous virus contamination,and any animal origin material is not used in the production process.

Stable quality: Mass production can ensure stable and continuous batch production.It is no difference between the batch and the product quality is stable.

High purity: Higher specific activity.Host protein residues is less than the limits of biological products.

Lyophilized powder: The product is lyophilized powder and is easy to store and transport.

Compliance with regulatory requirements: Production equipment and production environment comply with relevant regulatory requirements, and the production process is in full compliance with NSF ISO 9001: 2008 quality system and GMP guidelines.

Complete quality documents: we can provide relevant regular support files in according to customers’ requirement.



Recombinant carboxypeptidase B

Sequencing grade trypsin

Recombinant enterokinase

Recombinant trypsin

Shanghai Yaxin Biotechnology Co. Ltd. is a biotech company founded in 2008 that focuses on the research and the production of recombinant proteins. Shanghai YaxinBio,located in Shanghai Juke Biotech Park, is ISO 9001 registered company since 2009.

Our main products are Animal Origin Free recombinant carboxypeptidase B and recombinant trypsin, which are of high importance for the production of human recombinant insulin.YaxinBio recombinant carboxypeptidase B and recombinant trypsin have no trace of other contaminating enzyme activities or enzyme inhibitors. They have been successfully used in the production process of recombinant insulin by several companies. Recombinant Trypsin can also be used in the process of cell culture.

Shanghai YaxinBio continuously strives to bring to its worldwide customers the best recombinant protein products. We will continue strengthen our product management and our internal system to meet the demands of biotech companies and scientists in the field of life sciences.

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