Description
Animal-free recombinant Carboxypeptidase B Rat expressed in Pichia pastoris yeast for research applications requiring precise C-terminal arginine/lysine removal. Carboxypeptidase B (CPB) consists of 307 amino acids with a molecular weight of 34.5 kDa and pl 5.76.
CPB is manufactured under ISO 9001:2015 quality system. Animal-origin-free (AOF). Suitable for research use only (RUO) applications. GMP Grade is available upon request (made-to-order custom production).
Applications
Carboxypeptidase B hydrolyzes the basic amino acids lysine (L), arginine (R), and ornithine from the C-terminal position of polypeptides.
Carboxypeptidase B is a critical reagent in the manufacturing of human therapeutics such as insulin and monoclonal antibodies (mAbs). It is also a critical reagent in the field of protein analysis, specifically in the precise determination of protein sequences and post-translational modifications.
- Peptide mapping and protein sequencing
- Determination of protein C-terminal amino acid
- Sequence analysis by successive cleavage of C-terminal basic amino acids.
- Therapeutic insulin production by converting pro-insulin to insulin.
- Therapeutic monoclonal antibodies manufacturing and quality control.

Characteristics & Specifications
Carboxypeptidase B Rat is provided as a solution with the following specification: 33 mM Tris/HCl, 0.1 mM ZnCl2, pH 7.5-8.5. Each batch is tested and released as per specifications to achieve consistent product quality.
| Quality: | Research Use Only (RUO). GMP Grade is available on request. |
| CAS Registry No.: | 9025-24-5 |
| EC No.: | 3.4.17.2 |
| Appearance: | clear, colorless to light yellow solution |
| Formulation: | 33 mM Tris/HCl, 0.1 mM ZnCl2 |
| pH Value: | 7.5 - 8.5 |
| Specific Activity: |
≥170 U/mg * * Unit Definition: 1 U = Hydrolysis of 1 μmol hippuryl-arginine per minute at 25°C, pH 7.65. |
| Purity (SDS-PAGE): | > 90% |
| Contaminants: |
|
| Animal Component-Free: | No TSE/BSE risk |
| Manufacturer: | Provis Biolabs |
| Country of Origin: | India |
Storage
Carboxypeptidase B Rat is stable at a long term storage temperature of -20°C. Avoid repeated freeze/thaw cycles.
Usage
This product is intended for laboratory research use only. Not for use in diagnostic or therapeutic procedures. This product may not be used as a pharmaceutical or veterinary drug, agricultural product, or food additive.
Other Names
Carboxypeptidase B, Carboxypeptidase-B, Cpb1, Cpb, EC:3.4.17.2, Peptidyl-L-lysine(L-arginine) hydrolase, Protaminase
Compare to Roche Carboxypeptidase B, recombinant.
Resources
Ilex Life Sciences LLC is an authorized distributor of Provis Biolabs pvt Ltd / Provis Biolabs LLC.

