Carboxypeptidase B Rat structure
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Carboxypeptidase B Rat (recombinant expressed in Pichia pastoris), GMP Grade

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Recombinant Carboxypeptidase B Rat is a 34.6 kDa protease expressed in Pichia pastoris yeast with specificity for basic amino acids such as lysine and arginine.

Carboxypeptidase B is GMP manufactured in a certified facility with animal component free certified raw materials.


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).


  • Animal-derived component free.
  • Pharmacopoeia certified formulation ingredient.
  • Manufactured under cGMP standards in ISO 9001:2015 certified facilities.
  • Extensive product characterization and documentation.

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.

Molecular Weight 35.2 kDa
Appearance clear, colorless to light yellow solution
Formulation 33 mM Tris/HCl, 0.1 mM ZnCl2
pH Value 7.5 - 8.5
Activity ≥ 400 U/ml (with Hippuryl-arginine)
Specific Activity > 230 U/ml (with Hippurly-arginine)
Protein Content 2.8 ± 0.5 mg/ml
Purity (RP-HPLC) ≥ 85%
Microbial Count TAMC < 5 CFU/ml
Microbial Count TYMC < 5 CFU/ml
Trypsin Activity ≤ 0.005% (Chromozyme)
Manufacturer Provis Biolabs
Country of Origin India


    Carboxypeptidase B Rat is stable at a long term storage temperature of -20°C. Avoid repeated freeze/thaw cycles.


    This product is intended for laboratory research and biomanufacturing 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:, Peptidyl-L-lysine(L-arginine) hydrolase, Protaminase

    Compare to Roche Carboxypeptidase B, recombinant.


    Ilex Life Sciences LLC is an authorized distributor of Provis Biolabs pvt Ltd.