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Recombinant PreScission Protease (rPSP) is a highly purified, restriction-grade 6×His-tagged protease derived from human rhinovirus 3C (HRV 3C). It specifically cleaves at the recognition sequence Leu-Glu-Val-Leu-Phe-Gln↓Gly-Pro (LEVLFQ↓GP), with the cleavage occurring between the Gln and Gly residues. This protease is commonly used to remove affinity tags from fusion proteins.
rPSP functions optimally at 30 °C, but retains activity at temperatures as low as 4 °C. Cleavage efficiency may vary with different fusion proteins, so optimization of enzyme amount, incubation time, and temperature is recommended. The His-tag allows easy removal of the protease after digestion using Ni²⁺ affinity chromatography.
The recombinant enzyme consists of 217 amino acids, has a molecular mass of approximately 24 kDa, and is produced through proprietary purification methods. It is fully biologically active.

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| Biological Activity | 0.6 IU/μl. Unit Definition: One unit is defined as the amount of enzyme needed to cleave 100 μg of fusion protein in 16 hours to 90% completion at 4°C in a buffer containing 50 mM Tris-HCl, pH 7.0, 150 mM NaCl, 1 mM EDTA, and 1 mM DTT. |
| Description | Recombinant PreScission Protease (rPSP) is a highly purified, restriction-grade 6×His-tagged protease derived from human rhinovirus 3C (HRV 3C). It specifically cleaves at the recognition sequence Leu-Glu-Val-Leu-Phe-Gln↓Gly-Pro (LEVLFQ↓GP), with the cleavage occurring between the Gln and Gly residues. This protease is commonly used to remove affinity tags from fusion proteins.
rPSP functions optimally at 30 °C, but retains activity at temperatures as low as 4 °C. Cleavage efficiency may vary with different fusion proteins, so optimization of enzyme amount, incubation time, and temperature is recommended. The His-tag allows easy removal of the protease after digestion using Ni²⁺ affinity chromatography.
The recombinant enzyme consists of 217 amino acids, has a molecular mass of approximately 24 kDa, and is produced through proprietary purification methods. It is fully biologically active. |
| Species | Human Rhinovirus |
| Tag | His |
| Synonyms | rPSP,PSP,HRV 3C Protease |
| Protein Purity | > 95% as determined by SDS-PAGE |
| Molecular Weight | 24 kDa (Reducing conditions) |
| Formulation | Sterile liquid solution contains 50 mM Tris, 150 mM NaCl, 1 mM EDTA, 1 mM DTT, 50% Glycerol, pH 7.5. |
| Stability & Storage | Recombinant PreScission Protease (rPSP) remains stable up to 1 year at -20°C from date of receipt. Please avoid freeze-thaw cycles. |
| Shipping | Shipping with blue ice. |
| Research Background | Recombinant PreScission Protease (rPSP) is a highly purified, restriction-grade 6×His-tagged protease derived from human rhinovirus 3C (HRV 3C). It specifically cleaves at the recognition sequence Leu-Glu-Val-Leu-Phe-Gln↓Gly-Pro (LEVLFQ↓GP), with the cleavage occurring between the Gln and Gly residues. This protease is commonly used to remove affinity tags from fusion proteins.
rPSP functions optimally at 30 °C, but retains activity at temperatures as low as 4 °C. Cleavage efficiency may vary with different fusion proteins, so optimization of enzyme amount, incubation time, and temperature is recommended. The His-tag allows easy removal of the protease after digestion using Ni²⁺ affinity chromatography. |
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