Three different procarboxypeptidases A and two different procarboxypeptidases B have been isolated.
The B1 and B2 forms differ from each other mainly in isoelectric point.
Carboxypeptidase B1 is a highly tissue-specific protein and is a useful serum marker for acute pancreatitis and dysfunction of pancreatic transplants.
It is not elevated in pancreatic carcinoma
The deduced 416aa preproenzyme (EC 3.4.17.2) has a 15aa signal peptide and a 95aa activation peptide.
It shares 76% and 84% sequence identity with the rat and bovine homologs, respectively.
DNA blot analysis indicated that the PCPB mRNA is transcribed from a single locus.
Northern blot analysis demonstrated pancreas-specific expression.
Applications:Suitable for use in ELISA, Western Blot, Immunohistochemistry, Immunocytochemistry.
Other applications not tested.
Recommended Dilution:ELISA: 1:100-1:5000Western Blot: 1:50-400Immunocytochemistry: 1:50-500Immunohistochemistry (frozen): 1:50-500Immunohistochemistry (paraffin): 1:10-100Optimal dilutions to be determined by the researcher.