The Enzyme Database

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Accepted name: carboxypeptidase B
Reaction: Preferential release of a C-terminal lysine or arginine amino acid
Other name(s): protaminase; pancreatic carboxypeptidase B; tissue carboxypeptidase B; peptidyl-L-lysine [L-arginine]hydrolase
Comments: A zinc enzyme formed from procarboxypeptidase B. Isolated from cattle, pig and dogfish pancreas and other sources, including skin fibroblasts [3] and adrenal medulla [4]. In peptidase family M14 (carboxypeptidase A family).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, MEROPS, PDB, CAS registry number: 9025-24-5
1.  Folk, J.E. Carboxypeptidase B (porcine pancreas). Methods Enzymol. 19 (1970) 504–508.
2.  Brodrick, J.W., Geokas, M.C. and Largman, C. Human carboxypeptidase B. II. Purification of the enzyme from pancreatic tissue and comparison with the enzymes present in pancreatic secretion. Biochim. Biophys. Acta 452 (1976) 468–481. [DOI] [PMID: 1009123]
3.  Butterworth, J. and Duncan, J.J. Carboxypeptidase B activity of cultured skin fibroblasts and relationship to cystic fibrosis. Clin. Chim. Acta 97 (1979) 39–43. [DOI] [PMID: 40714]
4.  Wallace, E.F., Evans, C.J., Jurik, S.M., Mefford, I.N. and Barchas, J.D. Carboxypeptidase B activity from adrenal medulla. Is it involved in the processing of proenkephalin? Life Sci. 31 (1982) 1793–1796. [PMID: 6130442]
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