33 kD
Carboxypeptidase B lyophilized powder was dissolved in sterile water or 25mM Tris-HCl (pH7.6) to make the concentration of enzyme solution 1-10mg /ml.
·24 month, 2 to 8 °C under sterile conditions
. After dissolution, store at -20℃ and avoid repeated freeze-thaw cycles.
[1] Akparov V, Sokolenko N, Timofeev V, Kuranova I. Structure of the complex of carboxypeptidase B and N-sulfamoyl-L-arginine. Acta Crystallogr F Struct Biol Commun. 2015 Oct;71(Pt 10):1335-40.
[2] James W. Brodrick, Michael C. Geokas, Corey Largman, Human carboxypeptidase B. II. Purification of the enzyme from pancreatic tissue and comparison with the enzymes present in pancreatic secretion, Biochimica et Biophysica Acta (BBA) - Enzymology, 1976, 468-481.
Carboxypeptidase B, also known as peptidyl-L-lysine (L-arginine) hydrolase, contains one Zn atom per molecule and can selectively hydrolyze arginine and lysine at the carboxyl end of proteins or polypeptides. CPB can be used in the production of recombinant insulin and its analogues, and the quality detection of recombinant antibodies. and also used in the production of other recombinant polypeptides.
20mM Tris-HCl 、100mM NaCl、Mannitol、Carboxypeptidase B
The recommended amount of Carboxypeptidase B is 1:50~1:1000 (w/w) compared with the target protein (mass ratio), the optimal pH is 7.5-9.0, and the appropriate enzyme digestion temperature is 25℃~37℃.
1. For different protein samples, it is necessary to explore the optimal enzyme concentration and reaction time.
2. Reaction at 25℃~37℃, the reaction time can be appropriately extended when digestion at 25℃.
2μg (R: reducing condition, N: non-reducing condition).
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