Welqut Protease, His

Welqut Protease, His

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  • Welqut Protease, His

  • Welqut Protease Staphylococcus aureus Recombinant, His Tag
  • ENZ-1114
  • Shipped with Ice Packs

Catalogue number



WELQut Protease is an extremely specific and recombinant serine protease from Staphylococcus aureus. The WELQut Protease identifies and accurately cleaves recombinant proteins that has a recognition sequence added to them, with the amino acid sequence Trp, Glu, Leu, Gln, X (any amino acid). WELQut Protease cut  externally from the  recognition sequence, therefor doesn’t leave extra amino acids bound to the target protein. The protease isn’t temperature sensitive (works in 4-30°C) or pH sensitive (pH 6.5-9.0), also, there is no need in any particular buffers.


Welqut Protease Recombinant is a single, non-glycosylated polypeptide chain containing 210 amino acids and having a molecular mass of 22kDa. The Welqut Protease is fused to a 6 amino acid His tag at C-terminus and is purified by proprietary chromatographic techniques.


Escherichia Coli. 

Physical Appearance

Sterile filtered colorless solution.


Welqut Protease contains 10 mM Na2HPO4, 50% glycerol, 1.8 mM KH2PO4, pH 7.3, 140 mM NaCl and 2.7 mM KCl.


Store at 4°C if entire vial will be used within 2-4 weeks.

Store, frozen at -20°C for longer periods of time.

For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).

Avoid multiple freeze-thaw cycles.


Greater than 97% as determined by SDS-PAGE.

Unit Definition

Each unit is defined as the amount of enzyme required to cleave ≥99% of 100μg of a control protein in 16 h at 20°C. Enzyme activity is assayed in 100μl 100 mM Tris-HCl (pH 8.0).

Safety Data Sheet


ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. They may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.

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