Recombinant Rat CPB (carboxypeptidase B) Protein

Name: Recombinant Rat CPB (carboxypeptidase B) Protein
Brand: Beta LifeScience
SKU: BL-1029SG
Availability: InStock

Collections: Enzymes, High-quality recombinant proteins, Protease

Our products are highly customizable to meet your specific needs. You can choose options such as endotoxin removal, liquid or lyophilized forms, preferred tags, and the desired functional sequence range for proteins. Submitting a written inquiry expedites the quoting process.

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Product Overview

Tag	N/A
Host Species	Rat
Synonym	CPB1; CPB2; Carboxylase B
Background	Carboxypeptidase B (CPB) is a metal-containing pancreatic endopeptidase that catalyzes the successive release of basic carboxy-terminal residues, such as Arg and Lys. CPB also targets other amino acids, albeit at a slower rate. These secondary target residues include valine, leucine, isoleucine, asparagine, glycine, and glutamine. CPB depends on Zn2+ to promote enzymatic activity. Conversely, the enzyme is inhibited by some heavy metals, including Cu2+, Hg2+; metal chelating agents such as EDTA and competing Arg and Lys residues. CPB functions between pH 5-12, with an optimal pH of 8. Enzyme activity also increases with rises in temperature. CPB is used in the production of recombinant human insulin and monoclonal antibody/IgG1 (mAb) processing.
Description	Recombinant rat tag-free CPB (109-end) was produced in yeast cells.
Source	yeast
AA Sequence	109a.a.-end
Purity	For specific purity information on a given lot, see related COA.
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Formulation	Recombinant protein is supplied in 50mM Tris-HCl, pH 7.5, 50mM NaCl, 10mM Glutathione, 0.25mM DTT, 0.1mM EDTA, 0.1mM PMSF and 25% glycerol.
Stability	The recombinant protein is stable for up to 12 months at -70°C
Usage	For Research Use Only
Storage	Recombinant Rat CPB (carboxypeptidase B) Protein should be stored should be stored at < -70°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.