C9268
Carboxypeptidase A from bovine pancreas
(Type II-PMSF treated), ≥50 units/mg protein, ready-to-use solution
Sinónimos:
Carboxypolypeptidase, Peptidyl-L-amino-acid hydrolase
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About This Item
Número de CAS:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54
Productos recomendados
grade
Proteomics Grade
Quality Level
form
ready-to-use solution
quality
(Type II-PMSF treated)
specific activity
≥50 units/mg protein
mol wt
~35 kDa
purified by
2× crystallization
impurities
≤0.05 BTEE units/mg protein chymotrypsin
≤10 BAEE units/mg protein trypsin
storage temp.
2-8°C
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Application
Carboxypeptidase A from bovine pancreas has been used in a study to investigate the expression of a soluble and activatable form of bovine procarboxypeptidase A in Escherichia coli. Carboxypeptidase A from bovine pancreas has also been used in a study to investigate the isolation and partial characterization of precursor forms of ostrich carboxypeptidase.
The enzyme from Sigma has been used as a comparison to study the specificity of Metarhizium anisopliae carboxypeptidase A (MeCPA). MeCPA had been genetically engineered to facilitate the removal of polyhistidine tags from the C-termini of recombinant proteins. It has also been used to de-tyrosinate α-tubulin, in vitro, in order to induce high affinity to ethyl-N-phenylcarbamate (EPC) sepharose.
Biochem/physiol Actions
Carboxypeptidase as isolated from bovine pancreas glands is a metalloenzyme that contains 1 g atom of zinc per mole of protein. It catalyzes the hydrolysis of the carboxyl-terminal peptide bond in peptides and proteins. It is primarily specific to aromatic and hydrophobic side chains such as phenylalanine, tryptophan or leucine. The enzyme also exhibits esterase activity. It is inhibited by beta-phenylpropionate and indole acetate.
Unit Definition
One unit will hydrolyze 1.0 μmole of hippuryl-L-phenylalanine per min at pH 7.5 at 25 °C.
Preparation Note
Treated with phenylmethylsulfonyl fluoride to eliminate trypsin and chymotrypsin activity. Dialyzed and recrystallized: aqueous suspension with toluene added.
Analysis Note
Protein determined by E1%/278
inhibitor
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substrate
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